Best Engine Intake Manifold Spacers of 2025
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Engine intake manifold spacers are a popular aftermarket modification for car enthusiasts looking to increase performance. These spacers are placed between the intake manifold and the engine block, creating a larger plenum chamber and increasing the volume of air that can enter the engine. This results in improved airflow and more power. Engine intake manifold spacers are available in a variety of materials and thicknesses to suit different engines and performance goals. They are a cost-effective way to enhance the performance of a vehicle without the need for expensive engine modifications.
At a Glance: Our Top Picks
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Top 10 Engine Intake Manifold Spacers
Skunk2 Ultra B/K-Series Intake Manifold Spacer
The Skunk2 Intake Manifold Spacer is designed for both Acura and Honda B-Series and K-Series engines, providing a half-liter increase in manifold volume. This enhancement allows for improved airflow, which can significantly boost engine performance. By optimizing the intake system, you can experience better throttle response and increased horsepower. The spacer is compatible with a range of models, making it a versatile choice for enthusiasts looking to upgrade their vehicle’s engine performance. With this product, you can enjoy a more efficient engine that responds quicker and delivers better overall power.
Skunk2 Racing Composite V2.0 Plenum Spacer
The Skunk2 Racing Composite V2.0 Plenum Spacer is an engine intake manifold spacer that increases plenum volume, lowers intake temperatures, and allows the engine's front cylinders to breathe more efficiently. The thicker design can provide up to 10hp gain, improved throttle response, and fuel efficiency increase of more than 2mpg. Made from aerospace thermo-polymer composite that offers superior thermal insulation characteristic, it is easy to install and is packaged with all necessary hardware. The gasket is 5/8" thick and it fits 3.5 VL VQ35 Engines.
Ford Racing Intake Spacer M9486A53
The Ford Intake Spacer is designed to enhance the performance of your vehicle's engine intake manifold. With dimensions of 17.44 inches in length, 3.86 inches in width, and 3.74 inches in height, it fits seamlessly into your car's system. Weighing only 2.12 pounds, it is lightweight, making installation easier without adding unnecessary bulk. This product comes as a single unit, ensuring you have everything you need for an effective upgrade. When you choose this spacer, you're opting for quality and convenience that can help improve your engine's airflow and efficiency.
SR Performance Intake Spacer for Mustang GT
The SR Performance Intake Spacer is designed specifically for 1996 to 2004 Mustang GT models, providing a straightforward installation process that allows you to enhance your vehicle's performance quickly. This solid aluminum construction not only ensures durability but also effectively increases both horsepower and torque, giving you a noticeable boost during your drives. With this spacer, you can enjoy improved engine efficiency, making your Mustang feel more powerful and responsive on the road. It's an ideal upgrade for those looking to maximize their car's potential without complicated modifications.
Cummins Air Intake Spacer PB 5266557
The Cummins Air Intake Spacer is designed to enhance the performance of your Cummins 4bt and 6bt engines. This product features OEM part numbers 5266557 and 3922484, ensuring compatibility and reliability. It comes with one connection spacer and two gaskets, providing everything you need for a complete installation. By using this spacer, you can improve airflow to the engine, which can lead to better efficiency and power. The included gaskets help create a secure seal, reducing the risk of leaks and maintaining optimal performance.
Skunk2 Ultra B/K-Series Intake Manifold Spacer
Skunk2 Spacer is designed to increase internal volume in your vehicle's engine. Crafted from 50L billet aluminum, it provides a durable and corrosion-resistant solution. The longer socket head hardware ensures a secure fit, while the inclusion of gaskets simplifies installation. This spacer is tailored for specific vehicles, offering a convenient upgrade to enhance performance.
Weiand 17-72 Intake Spacer
The Weiand Spacer is a phenolic intake manifold spacer with 1 11/16" bores and a height of 1". The phenolic material helps dissipate heat, improving air/fuel mixture quality for better combustion. The 1 11/16" bores enhance airflow, increasing engine performance. At 1" height, it provides ample clearance for various engine setups. Installing the Weiand Spacer can boost horsepower and torque by optimizing air intake efficiency.
LOSTAR LS1 LS6 Injector Spacer Set
The LOSTAR Injector Spacer Set is crafted from high-quality materials, ensuring durability and a long lifespan. It meets strict quality control standards, which means you can trust its performance. This set allows you to easily adapt short LS Truck fuel injectors to a taller LS1 or LS6 intake manifold, making it ideal for engine swaps. Additionally, it comes with a one-year unlimited-mileage quality guarantee, so you can feel confident in your purchase and reach out for support if needed.
Blox Racing Intake Plenum Spacer for G35
The Blox Racing BXIM-40201-G2 Thermal Shield Intake Plenum Spacer is a 5/16" thick engine intake manifold spacer designed to improve performance by reducing heat transfer to the intake manifold. This top-quality product is affordably priced and expertly made from premium materials, making it an excellent choice for G35 owners looking to upgrade their vehicle's performance.
Holley 17-27 Intake Spacer
The Holley Intake Manifold Spacer is crafted from durable cast aluminum, making it a reliable choice for enhancing engine performance. This material not only provides strength but also helps in heat dissipation, ensuring your engine runs cooler. The spacer is designed to increase airflow, which can lead to improved power and efficiency. By adding this component to your engine setup, you can experience better throttle response and overall performance. It's an ideal upgrade for those looking to maximize their vehicle's capabilities.
Frequently Asked Questions (FAQs)
1. What do intake manifold spacers do?
Intake manifold spacers are aftermarket enhancements that are bolted on the back of the throttle body. They are designed to increase fuel economy, torque, and horsepower by directing the flow of air into the manifold and maximizing the volume of air that goes into the intake.
2. Do throttle body spacers do anything?
Yes, throttle body spacers can improve high-rpm power by increasing the volume of the intake plenum. They work similarly to carburetor spacers and are used with multi-port injection systems. Throttle body spacers can improve throttle response, low to mid-range power, and fuel economy.
3. Do carburetor spacers work?
Yes, carburetor spacers can provide more horsepower by increasing the volume of the intake plenum. Additionally, they act as insulators, keeping engine heat away from the carburetor to ensure cooler incoming air and fuel. Carburetor spacers are typically made from wood, aluminum, phenolic resin, or polymer.
4. What are the benefits of intake spacers?
Intake spacers provide extra room for more air to enter the intake manifold. This allows the engine to perform more efficiently and generate more horsepower and torque. While the change may not be drastic, adding a spacer can improve combustion reactions and overall engine performance.
5. Do intake manifolds increase horsepower?
A properly designed intake manifold that matches the engine's requirements can increase torque and horsepower compared to a mismatched manifold. The intake manifold is more than just a connection between the carburetor or throttle body and the cylinder head ports. It plays a crucial role in optimizing airflow and fuel delivery.
6. What are the pros and cons of a throttle body spacer?
Throttle body spacers are generally easy to install and do not cause major issues. However, in some cases, they may reduce low-end torque, particularly in smaller engines. Adjustments to intake runner length may also be necessary. Overall, installation is usually straightforward, and the benefits include improved performance and fuel efficiency.
7. What are the benefits of a phenolic spacer?
Phenolic spacers offer good insulation properties and durability. They are a compromise between wood (best insulator) and aluminum (most durable). Alternatively, polymer spacers are also durable and offer decent insulation properties, often at a lower cost compared to phenolic resin spacers.
8. What is the best material for spacers?
Spacers are typically made of metal, but other materials like nylon can be used for non-conductive applications. Nylon spacers are commonly used as screw insulators. The choice of material depends on the specific requirements of the spacer and its intended use.
9. Is a 2 inch carb spacer better than a 1 inch?
The height of a carb spacer depends on the specific application. A two-inch-tall spacer is generally a good choice for race cars operating at higher RPMs. For street cars with lower RPMs and hood clearance limitations, a one-inch spacer may be more suitable. The spacer's purpose is to optimize air-fuel mixture efficiency and vaporization.
10. What is the benefit of a 1 inch carb spacer?
A one-inch carb spacer increases the distance between the intake manifold and the bottom of the carburetor, reducing the velocity of the intake charge. This helps prevent reversion from pressure pulses and improves the efficiency of the air-fuel mixture. Four-hole spacers are commonly used to direct the airflow more effectively.
During our engine intake manifold spacer research, we found 24 engine intake manifold spacer products and shortlisted 10 quality products. We collected and analyzed 3,627 customer reviews through our big data system to write the engine intake manifold spacers list. We found that most customers choose engine intake manifold spacers with an average price of $104.61.
The engine intake manifold spacers are available for purchase. We have researched hundreds of brands and picked the top brands of engine intake manifold spacers, including Skunk2 Racing, Ford, SR Performance, PB, Holley. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.
Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.