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Flowmaster

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When purchasing a product, price is the consumer's primary concern. At present, Flowmaster has 306 products for sale. Flowmaster products range in price from $58.45 to $403.78, and the average price of all the products is about $115.94.

You can confidently purchase Flowmaster products on Amazon.com. The brand holds an average rating of 4.7, testifying to its excellent reputation.

Flowmaster Best Sellers

Last Updated: Jan 9, 2026

Flowmaster Flow FX Chambered Muffler – 3.00” Center In / 3.00” Center Out – Round Body –Moderate Sound – Stainless Steel – Affordable Performance for Modern Trucks, Muscle Cars & Daily Drivers (71419)

STRAIGHT-THROUGH PERFORMANCE: Flowmaster's Flow FX series mufflers deliver a moderate performance tone that's deeper than chambered mufflers without excessive cabin drone.
PERFORATED CORE TECHNOLOGY: Features a large diameter straight-through stainless steel perforated core with high-temp sound-absorbing materials for a deep, traditional mellow tone.
PROVEN PERFORMANCE: Improves horsepower and torque by enhancing exhaust flow and reducing back pressure—ideal for street enthusiasts and daily drivers.
BUILT TO LAST: Made from durable 409S stainless steel and fully MIG-welded to ensure long-lasting performance, corrosion resistance, and vibration.
UNIVERSAL FITMENT: Designed for maximum versatility with reversible flow paths, fitting tight spaces and custom builds with multiple inlet/outlet configurations.

Flowmaster 40 Series Original Chambered Muffler – 2.50” Offset In / 2.50” Center Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks, SUVs & Strip Builds (42541)

LEGENDARY SOUND: This is the original Flowmaster muffler that enthusiasts know and love! Famous for its bold, aggressive bark and signature tone. It delivers the unmistakable attitude and street presence that made Flowmaster a legend.
TWO-CHAMBERED INTERNAL DESIGN: Flowmaster's classic two-chambered layout delivers that bold, aggressive exhaust sound Flowmaster is known for. Perfect for muscle cars, street rods, trucks, off-road rigs, and custom builds.
PROVEN PERFORMANCE: Enhances airflow and reduces back pressure to help boost horsepower, torque, and throttle response.
BUILT TO LAST: Made from 16-gauge aluminized steel and fully MIG-welded to withstand high heat and vibration with no internal packing to blow out or wear down.
UNIVERSAL FITMENT: Designed for custom and modified exhaust systems, with multiple inlet/outlet sizes and configurations (center/offset, dual) for simplified installation and optimal fit.

Flowmaster Flow FX Chambered Muffler – 2.50” Offset In / 2.50” Center Out – Moderate Sound – Stainless Steel – Affordable Performance for Modern Trucks, Muscle Cars & Daily Drivers (71226)

STRAIGHT-THROUGH PERFORMANCE: Flowmaster's Flow FX series mufflers deliver a moderate performance tone that's deeper than chambered mufflers without excessive cabin drone.
PERFORATED CORE TECHNOLOGY: Features a large diameter straight-through stainless steel perforated core with high-temp sound-absorbing materials for a deep, traditional mellow tone.
PROVEN PERFORMANCE: Improves horsepower and torque by enhancing exhaust flow and reducing back pressure—ideal for street enthusiasts and daily drivers.
BUILT TO LAST: Made from durable 409S stainless steel and fully MIG-welded to ensure long-lasting performance, corrosion resistance, and vibration.
UNIVERSAL FITMENT: Designed for maximum versatility with reversible flow paths, fitting tight spaces and custom builds with multiple inlet/outlet configurations.

Flowmaster Super 10 Series Chambered Muffler – 3.00” Center In / 3.00” Center Out – Race-Inspired Sound – 409 Stainless Steel – Ideal for Muscle Cars, LS Swaps, Drag Cars & Off-Road Build (843015)

RACE-INSPIRED PERFORMANCE DESIGN: Flowmaster's loudest, most aggressive chambered muffler, built for extreme tone and raw street presence. Ideal for muscle cars, LS swaps, lifted trucks, drag cars, retro-mods, and off-road builds. Built for hardcore enthusiasts who want to be heard before they're seen. This muffler makes no apologies for being loud.
LEGENDARY DELTA FLOW TECHNOLOGY: Patented internal chambered muffler design increases exhaust velocity and reduces back pressure for maximum power and performance.
PROVEN PERFORMANCE: Enhances exhaust flow to boost horsepower, torque and increased throttle response.
BUILT TO LAST: Constructed from premium 409 stainless steel for ultimate durability and fully MIG-welded to withstand extreme heat, vibration, and tough driving conditions.
UNIVERSAL FITMENT: Designed with a short case length to accommodate a wide range of custom builds and modified exhaust setups, available in multiple inlet/outlet sizes and configurations.

Flowmaster 40 Series Original Chambered Muffler – 3.00” Offset In / 3.00” Offset Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks, SUVs & Strip Builds (43043)

LEGENDARY SOUND: This is the original Flowmaster muffler that enthusiasts know and love! Famous for its bold, aggressive bark and signature tone. It delivers the unmistakable attitude and street presence that made Flowmaster a legend.
TWO-CHAMBERED INTERNAL DESIGN: Flowmaster's classic two-chambered layout delivers that bold, aggressive exhaust sound Flowmaster is known for. Perfect for muscle cars, street rods, trucks, off-road rigs, and custom builds.
PROVEN PERFORMANCE: Enhances airflow and reduces back pressure to help boost horsepower, torque, and throttle response.
BUILT TO LAST: Made from 16-gauge aluminized steel and fully MIG-welded to withstand high heat and vibration with no internal packing to blow out or wear down.
UNIVERSAL FITMENT: Designed for custom and modified exhaust systems, with multiple inlet/outlet sizes and configurations (center/offset, dual) for simplified installation and optimal fit.

Flowmaster 40 Series Original Chambered Muffler – 3.00” Center In / 2.50” Dual Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks, SUVs & Strip Builds (430402)

LEGENDARY SOUND: This is the original Flowmaster muffler that enthusiasts know and love! Famous for its bold, aggressive bark and signature tone. It delivers the unmistakable attitude and street presence that made Flowmaster a legend.
TWO-CHAMBERED INTERNAL DESIGN: Flowmaster's classic two-chambered layout delivers that bold, aggressive exhaust sound Flowmaster is known for. Perfect for muscle cars, street rods, trucks, off-road rigs, and custom builds.
PROVEN PERFORMANCE: Enhances airflow and reduces back pressure to help boost horsepower, torque, and throttle response.
BUILT TO LAST: Made from 16-gauge aluminized steel and fully MIG-welded to withstand high heat and vibration with no internal packing to blow out or wear down.
UNIVERSAL FITMENT: Designed for custom and modified exhaust systems, with multiple inlet/outlet sizes and configurations (center/offset, dual) for simplified installation and optimal fit.

Flowmaster Super 40 Series Chambered Muffler - 3.0” Center In/Offset Out - Aggressive Sound - Aluminized Steel - Perfect for Muscle Cars, Lifted Trucks, Street Rods, and High-Torque Builds (953047)

BOLD, DEEP SOUND WITH STREET REFINEMENT: Builds on the legendary 40 Series tone, delivering an even deeper, more powerful exhaust note with reduced in-cab resonance.
IDEAL FOR MUSCLE CARS, TRUCKS & STREET RODS: Engineered for high-torque builds that demand powerful exhaust flow and durability. Perfect for modern HEMIs, classic small-blocks, and LS-powered projects.
INTERIOR RESONANCE AT CRUISING SPEEDS: Delta Flow chambered design enhances scavenging and airflow for improved torque, throttle response, and acceleration, while helping minimize interior resonance at cruising speeds.
BUILT TO LAST: Constructed from 16-gauge aluminized steel and fully MIG-welded for durability under high heat, vibration, and aggressive driving conditions.
UNIVERSAL FITMENT: Available in multiple inlet/outlet sizes and configurations to fit a wide variety of custom builds and modified vehicles. Case dimensions: 13.0” L x 10” W x 5.0” H.

Flowmaster Flow FX Chambered Muffler – 2.25” Center In / 2.25” Center Out – Round Body – Moderate Sound – Stainless Steel – Affordable Performance for Modern Trucks, Muscle Cars & Daily Drivers, 71415

STRAIGHT-THROUGH PERFORMANCE: Flowmaster's Flow FX series mufflers deliver a moderate performance tone that's deeper than chambered mufflers without excessive cabin drone.
PERFORATED CORE TECHNOLOGY: Features a large diameter straight-through stainless steel perforated core with high-temp sound-absorbing materials for a deep, traditional mellow tone.
PROVEN PERFORMANCE: Improves horsepower and torque by enhancing exhaust flow and reducing back pressure—ideal for street enthusiasts and daily drivers.
BUILT TO LAST: Made from durable 409S stainless steel and fully MIG-welded to ensure long-lasting performance, corrosion resistance, and vibration.
UNIVERSAL FITMENT: Designed for maximum versatility with reversible flow paths, fitting tight spaces and custom builds with multiple inlet/outlet configurations.

Flowmaster 40 Series Original Chambered Muffler – 2.50” Dual In / 2.50” Dual Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks, SUVs & Strip Builds (425404)

LEGENDARY SOUND: This is the original Flowmaster muffler that enthusiasts know and love! Famous for its bold, aggressive bark and signature tone. It delivers the unmistakable attitude and street presence that made Flowmaster a legend.
TWO-CHAMBERED INTERNAL DESIGN: Flowmaster's classic two-chambered layout delivers that bold, aggressive exhaust sound Flowmaster is known for. Perfect for muscle cars, street rods, trucks, off-road rigs, and custom builds.
PROVEN PERFORMANCE: Enhances airflow and reduces back pressure to help boost horsepower, torque, and throttle response.
BUILT TO LAST: Made from 16-gauge aluminized steel and fully MIG-welded to withstand high heat and vibration with no internal packing to blow out or wear down.
UNIVERSAL FITMENT: Designed for custom and modified exhaust systems, with multiple inlet/outlet sizes and configurations (center/offset, dual) for simplified installation and optimal fit.

Flowmaster 40 Series Original Chambered Muffler – 2.25” Offset In / 2.25” Center Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks & SUVs (42441)

LEGENDARY SOUND: This is the original Flowmaster muffler that enthusiasts know and love! Famous for its bold, aggressive bark and signature tone. It delivers the unmistakable attitude and street presence that made Flowmaster a legend.
TWO-CHAMBERED INTERNAL DESIGN: Flowmaster's classic two-chambered layout delivers that bold, aggressive exhaust sound Flowmaster is known for. Perfect for muscle cars, street rods, trucks, off-road rigs, and custom builds.
PROVEN PERFORMANCE: Enhances airflow and reduces back pressure to help boost horsepower, torque, and throttle response.
BUILT TO LAST: Made from 16-gauge aluminized steel and fully MIG-welded to withstand high heat and vibration with no internal packing to blow out or wear down.
UNIVERSAL FITMENT: Designed for custom and modified exhaust systems, with multiple inlet/outlet sizes and configurations (center/offset, dual) for simplified installation and optimal fit.

Flowmaster 9430472 Super 44 Series Chambered Muffler

Noticeable interior resonance
Recent two chamber improvement
Race proven Delta Flow technology
Deep Aggressive Sound Exhaust Note

Flowmaster Super 44 Series Chambered Muffler – 2.25” - Offset In/Offset Out – Aggressive Sound – 16 Gauge Aluminized Steel – For Classic & Late Muscle Cars, Street Rods, Trucks, SUVs (942448)

DEEPEST, MOST AGGRESSIVE TWO-CHAMBER SOUND: Built as the next evolution of the 40 Series, the Super 44 features an additional internal chamber with both chambers sized and spaced differently. This design delivers a deeper tone, improved performance, and aggressive exterior sound level, while offering moderate interior resonance.
TWO-CHAMBERED INTERNAL DESIGN: Engineered with Flowmaster's Delta Flow dual-chamber technology, the Super 44's two-chamber configuration improves scavenging, enhances power and torque, boosts throttle response, and helps reduce interior resonance.
PROVEN PERFORMANCE: Enhances airflow and exhaust efficiency for better throttle response, acceleration, and all-around street performance across the RPM range.
BUILT TO LAST: Constructed from 16-gauge aluminized steel and fully MIG-welded for durability under high heat, vibration, and aggressive driving conditions.
UNIVERSAL FITMENT: Compact 4-inch case works in tighter clearances where bigger mufflers won't fit. Ideal for muscle cars, trucks, off-road rigs, hot rods, lowered customs, and street/strip builds and daily drivers that want to stand out. Available in multiple inlet/outlet options to support custom builds and modified vehicles. Main case dimensions: 13” length x 9.5” width x 4.0” thick.

Flowmaster Super 44 Series Chambered Muffler – 3.00” - Center In/Center Out – Aggressive Sound – 16 Gauge Aluminized Steel – For Classic & Late Muscle Cars, Street Rods, Trucks, SUVs (943045)

DEEPEST, MOST AGGRESSIVE TWO-CHAMBER SOUND: Built as the next evolution of the 40 Series, the Super 44 features an additional internal chamber with both chambers sized and spaced differently. This design delivers a deeper tone, improved performance, and aggressive exterior sound level, while offering moderate interior resonance.
TWO-CHAMBERED INTERNAL DESIGN: Engineered with Flowmaster's Delta Flow dual-chamber technology, the Super 44's two-chamber configuration improves scavenging, enhances power and torque, boosts throttle response, and helps reduce interior resonance.
PROVEN PERFORMANCE: Enhances airflow and exhaust efficiency for better throttle response, acceleration, and all-around street performance across the RPM range.
BUILT TO LAST: Constructed from 16-gauge aluminized steel and fully MIG-welded for durability under high heat, vibration, and aggressive driving conditions.
UNIVERSAL FITMENT: Compact 4-inch case works in tighter clearances where bigger mufflers won't fit. Ideal for muscle cars, trucks, off-road rigs, hot rods, lowered customs, and street/strip builds and daily drivers that want to stand out. Available in multiple inlet/outlet options to support custom builds and modified vehicles. Main case dimensions: 13” length x 9.5” width x 4.0” thick.

NEW FLOWMASTER 40 SERIES CHAMBERED MUFFLER,OVAL,BLACK,DUAL 2.5" INLET & OUTLET,19" OVERALL LENGTH

Body Height (in) 4 Body Length (in) 13 Body Width (in) 9.5 Brand Flowmaster
California Proposition 65 Required No Emission Code 5 Inlet Connection Type Pipe Connection Inlet Diameter (in) 2.5
Inlet Position Dual Material Aluminized Steel Muffler Series Original 40 Series Outlet Diameter (in) 2.5 Outlet Position Dual
Product Type Street Mufflers Shape Oval Sound Level Aggressive Sound Part Number 425404

Flowmaster 40 Series Original Chambered Muffler – 2.25” Offset In / 2.25” Offset Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks & SUVs (42443)

LEGENDARY SOUND: This is the original Flowmaster muffler that enthusiasts know and love! Famous for its bold, aggressive bark and signature tone. It delivers the unmistakable attitude and street presence that made Flowmaster a legend.
TWO-CHAMBERED INTERNAL DESIGN: Flowmaster's classic two-chambered layout delivers that bold, aggressive exhaust sound Flowmaster is known for. Perfect for muscle cars, street rods, trucks, off-road rigs, and custom builds.
PROVEN PERFORMANCE: Enhances airflow and reduces back pressure to help boost horsepower, torque, and throttle response.
BUILT TO LAST: Made from 16-gauge aluminized steel and fully MIG-welded to withstand high heat and vibration with no internal packing to blow out or wear down.
UNIVERSAL FITMENT: Designed for custom and modified exhaust systems, with multiple inlet/outlet sizes and configurations (center/offset, dual) for simplified installation and optimal fit.

Flowmaster 842546 Super 44 Series Chambered Muffler

Race proven Delta Flow technology
Deep Aggressive Sound Exhaust Note
Noticeable interior resonance
Recent two chamber improvement

Flowmaster 817633 Outlaw Direct Fit Muffler

Direct Bolt-on for Quick & Easy Installation
Race Proven Outlaw Muffler Technology
Dyno Tuned For Maximum Performance
Uses the Factory Hanger Locations
Deep Powerful Aggressive Sound

Flowmaster Super 44 Series Chambered Muffler – 2.50” - Offset In/Center Out – Aggressive Sound – 16 Gauge Aluminized Steel - For Classic & Late Muscle Cars, Street Rods, Trucks, SUVs (942546)

DEEPEST, MOST AGGRESSIVE TWO-CHAMBER SOUND: Built as the next evolution of the 40 Series, the Super 44 features an additional internal chamber with both chambers sized and spaced differently. This design delivers a deeper tone, improved performance, and aggressive exterior sound level, while offering moderate interior resonance.
TWO-CHAMBERED INTERNAL DESIGN: Engineered with Flowmaster's Delta Flow dual-chamber technology, the Super 44's two-chamber configuration improves scavenging, enhances power and torque, boosts throttle response, and helps reduce interior resonance.
PROVEN PERFORMANCE: Enhances airflow and exhaust efficiency for better throttle response, acceleration, and all-around street performance across the RPM range.
BUILT TO LAST: Constructed from 16-gauge aluminized steel and fully MIG-welded for durability under high heat, vibration, and aggressive driving conditions.
UNIVERSAL FITMENT: Compact 4-inch case works in tighter clearances where bigger mufflers won't fit. Ideal for muscle cars, trucks, off-road rigs, hot rods, lowered customs, and street/strip builds and daily drivers that want to stand out. Available in multiple inlet/outlet options to support custom builds and modified vehicles. Main case dimensions: 13” length x 9.5” width x 4.0” thick.

Flowmaster Super 44 Series Chambered Muffler – 2.50” - Center In/Center Out – Aggressive Sound – 16 Gauge Aluminized Steel – For Classic & Late Muscle Cars, Street Rods, Trucks, SUVs (942545)

DEEPEST, MOST AGGRESSIVE TWO-CHAMBER SOUND: Built as the next evolution of the 40 Series, the Super 44 features an additional internal chamber with both chambers sized and spaced differently. This design delivers a deeper tone, improved performance, and aggressive exterior sound level, while offering moderate interior resonance.
TWO-CHAMBERED INTERNAL DESIGN: Engineered with Flowmaster's Delta Flow dual-chamber technology, the Super 44's two-chamber configuration improves scavenging, enhances power and torque, boosts throttle response, and helps reduce interior resonance.
PROVEN PERFORMANCE: Enhances airflow and exhaust efficiency for better throttle response, acceleration, and all-around street performance across the RPM range.
BUILT TO LAST: Constructed from 16-gauge aluminized steel and fully MIG-welded for durability under high heat, vibration, and aggressive driving conditions.
UNIVERSAL FITMENT: Compact 4-inch case works in tighter clearances where bigger mufflers won't fit. Ideal for muscle cars, trucks, off-road rigs, hot rods, lowered customs, and street/strip builds and daily drivers that want to stand out. Available in multiple inlet/outlet options to support custom builds and modified vehicles. Main case dimensions: 13” length x 9.5” width x 4.0” thick.

Flowmaster Super 10 Series Chambered Muffler – 2.50" Center In / 2.25" Dual Out – Race-Inspired Sound – 409 Stainless Steel – Ideal for Muscle Cars, LS Swaps, Drag Cars & Off-Road Build (8425152)

RACE-INSPIRED PERFORMANCE DESIGN: Flowmaster's loudest, most aggressive chambered muffler, built for extreme tone and raw street presence. Ideal for muscle cars, LS swaps, lifted trucks, drag cars, retro-mods, and off-road builds. Built for hardcore enthusiasts who want to be heard before they're seen. This muffler makes no apologies for being loud.
LEGENDARY DELTA FLOW TECHNOLOGY: Patented internal chambered muffler design increases exhaust velocity and reduces back pressure for maximum power and performance.
PROVEN PERFORMANCE: Enhances exhaust flow to boost horsepower, torque and increased throttle response.
BUILT TO LAST: Constructed from premium 409 stainless steel for ultimate durability and fully MIG-welded to withstand extreme heat, vibration, and tough driving conditions.
UNIVERSAL FITMENT: Designed with a short case length to accommodate a wide range of custom builds and modified exhaust setups, available in multiple inlet/outlet sizes and configurations.

Flowmaster FAQs

Yes, Flowmaster is a legitmate brand on Amazon. After conducting a comprehensive analysis of 7,024 customer reviews for Flowmaster products on Amazon, we have determined its average rating. With a strong performance and good quality, Flowmaster has received an average rating of 4.7 from numerous buyers, indicating that Flowmaster are trustworthy and live up to their claims. Therefore, it is safe to make purchases from Flowmaster on Amazon.

Amazon has strict policies and safety measures in place that ensure only legitimate sellers and products are allowed on their platform. It also provides a secure payment gateway and offers buyer protection, ensuring your transaction is safe. In the unlikely event that there's an issue with your purchase, Amazon's customer service and return policies are designed to protect your interests.

If you're interested in Flowmaster and want to find more Flowmaster products, you can follow the steps below:

  1. Go back to FindThisBest's homepage.
  2. Type Flowmaster in the search box and hit Enter to see the search results.
  3. Find and click the correct Flowmaster to go to the new page.
  4. Select the products you want in the Flowmaster buying guide, and take a glance at the prices and features of the products.
  5. View the products interest you on Amazon to read the customer reviews and check the ratings. Besides, you can hit the "brand" to find more Flowmaster products.

We analyze millions of Flowmaster products reviews and customer reviews to recommend the best picks for most consumers. We have a professional team with decades of experience to test the products, which can help ensure that we provide our readers with accurate advice and best recommendations.

There are usually 5 to 10 products in a brand buying guide. We found 306 Flowmaster products for sale, 20 of which were analyzed in detail and recommended to customers.

  1. Go to the Flowmaster page.
  2. Select the product you want in the Flowmaster buying guide, and then view the product on Amazon. For example, if you are interested in the top 1 product Flowmaster Flow FX Chambered Muffler – 3.00” Cente..., you can view it on Amazon page.
  3. Place your order on Amazon.

Our mission is to provide you with the most up-to-date and objective information about the Flowmaster products, helping you make more informed buying decisions. We recommend best choices of the products from the Flowmaster brand, helping you make better shopping choices with less time and energy.