MACE PERFORMANCE 6.35MM PLENUM SPACER TO SUIT FPV PURSUIT BA BF FG BOSS 290 315 5.4L V8
SKU: 43527730596

MACE PERFORMANCE 6.35MM PLENUM SPACER TO SUIT FPV PURSUIT BA BF FG BOSS 290 315 5.4L V8

Sale price$82.80 Regular price$92.00
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Description

MACE PERFORMANCE 6.35MM PLENUM SPACER TO SUIT FPV PURSUIT BA BF FG BOSS 290 315 5.4L V8Exclusive to Mace Engineering is our design registered plenum spacer to suit FPV Boss 290 and 315 V8 engines. What is a plenum spacer and what does it do? A plenum spacer thermally separates the plenum cover and intake manifold. Its main purpose is to improve air distribution between cylinders by slowing down the air speed inside the plenum chamber. As a result there is less of a pressure drop inside the plenum chamber between cylinders, and less air

Exclusive to Mace Engineering is our design-registered plenum spacer to suit FPV Boss 290 and 315 V8 engines.

What is a plenum spacer and what does it do?

A plenum spacer thermally separates the plenum cover and intake manifold. Its main purpose is to improve air distribution between cylinders by slowing down the air speed inside the plenum chamber. As a result there is less of a pressure drop inside the plenum chamber between cylinders, and less air momentum, resulting in better air distribution and power. The change in airflow characteristics is shown in the diagram below.

Not only will our spacer help you make more power, it will also help prevent any costly rebuilds through dangerous lean outs that occur with standard manifolds in high horsepower/boost applications (due to poor air distribution).

In addition to improving air distribution between cylinders, the increase in plenum volume also has a positive effect on bottom end torque.

The fact these spacers are manufactured from the same thermal resistant composite material as our manifold insulators means further horsepower gains are possible due to the reduction in heat soak.

Key benefits:

  • Design registered.
  • Reduces charge air temperature resulting in better power consistency and detonation prevention.
  • Power increase with no undesirable side effects.
  • Improved air distribution between each cylinder.
  • Improved fuel economy.
  • Easy to install.
  • Can be used as a replacement gasket.
  • Reusable.
  • Proven gains at an affordable price.

Contents:

  • 01 XPlenum spacer
  • 01 X Silicone gasket maker
  • 04 X Spacer bush

Vehicle Fitment Guide

Note: Installation is very straight forward, requiring only the removal of your plenum cover to install the plenum spacer.

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Exchange/Return Notes
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SKU: 43527730596

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TracyAZ
Charlottesville, US
★★★★★ 3
Not Durable…Splintered….
Had to chuck these. I loved them at first but they are not durable. Scratched themselves up right away and then the mid sized one started to splinter. I didn’t even have it for very long before I had to get rid of them. Long enough to not be able to return. I prefer the bamboo as far as wood goes, but switched to an antibacterial. It’s crazy because I had the same cutting boards for years and in the past month I’ve had to replace them 3 times now. I was so disappointed because there were such amazing reviews. Sadly that was not the case for me. I give it a 3 because they are absolutely beautiful…..you get points for being beautiful I suppose in this world. But not durable. At least not for me.
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Reviewed in the United States on January 22, 2026
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EmmaNuelle
Battle Creek, US
★★★★★ 5
Perfect cutting board set of 3
Very nice cutting boards, and I especially love the peace of mind knowing there is not harsh chemicals used to make these. Thank you!
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Reviewed in the United States on May 27, 2026
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Jay Matthews
Whiting, US
★★★★★ 5
This is Mike Wittmer at his finest
Format: Paperback
If you are at all familiar with Mike Wittmer's books and devotionals, you know he has a sharp wit and an engaging style. This book delivers both in abundance. With clarity and conciseness, Mike walks through 40 well-known theological concepts popular among Americans. Although he writes from an Evangelical perspective, Mike brings his trademark honest critique to each topic, admitting his own biases while still highlighting the validity of other viewpoints. His explanations, critiques, and examples will make you laugh and think, and I truly believe this book would make a great basis for a Sunday school or other church education series.
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Reviewed in the United States on June 29, 2023
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EyeDoc
Omaha, US
★★★★★ 5
Fortunate to buy this book
Format: Kindle
Fantastic book, packed with well written information and interspersed with humor. Well worth the price, I will now have to look for more of Wittmer's works, and hope he has more coming in the fashion of this one. This is the 3rd Urban Legends of the bible Ive read in the series and also the best.
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GMA
Birmingham, US
★★★★★ 3
The Editorial Company Wolters Kluwer and VitalSource
Format: Hardcover
I was looking forward to my textbook which arrived in great condition. I needed to activate the ebook and it was a disaster. I could not redeem my code for unclear reasons, I called the number in the textbook which took me to an India location, answered by someone who could not enter my e-mail correctly, and ended having to create a ticket. I was told I had to wait 24-48 hours to resolve the issue. I called the Editorial company and they were not able to help stating it was not their issue. It has been very frustrating. I bought 6 medical books from Elsevier, all of them redeemed as I received them, immediately activated. No hassles at all. Big difference in services between editorial companies and digital resources
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Reviewed in the United States on November 30, 2023

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