SKU: 19606306135

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

Sale price$72.86 Regular price$80.95
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Ships within 48 hours · Estimated delivery Aug 22 - Aug 27

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Description

MACE PERFORMANCE 6.35MM PLENUM SPACER TO SUIT FPV SUPER 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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 19606306135

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Lisa Hester
Lexington, US
★★★★★ 4
Great toy but never received the replacement they offer.
It’s is a very durable toy. But not indestructible. My dog loves the ball and it did last 4 months which is much longer than any of his other toys. I emailed the company to see if they honored their one time replacement policy for Amazon orders. I was told they do and was told I was shipped a replacement. But we never received it. We’ve ordered plenty from Amazon before and after this so I don’t know where the hold up would of happened but here we are. I did email the company back and told them that I didn’t receive the replacement and asked if they could verify my address….but they haven’t responded. Just sucks. Would of been great if I actually got the replacement!
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Reviewed in the United States on May 13, 2025
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Giovanni Gutierrez
Alexandria, US
★★★★★ 5
My HEAVY chewers favorite ball
It's dense and has some weight to it, can definitely get good distance when throwing and it bounces a long way. It's soft enough for my dog to chew on but tough enough that even with her destroying every toy I get her she looses these before ever tearing into them. About softball size.
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Reviewed in the United States on April 3, 2026
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Sara
West Palm Beach, US
★★★★★ 5
Safe
I normally don't write reviews but these products deserve the effort! I bought 4 different black toys from this Brand and all are still intact after 6 months heavy usage by 2 aggressive chewers (a Belg Malinois & black Lab), fantastic products and unlike so many other brands promising to be indestructible, these are the first toys that were not eaten within a month. No more visits to Vet to pay for Xrays after digesting plastic or rubber from badly made toys. Highly recommended.
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Reviewed in the United States on April 5, 2026
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Kevin
Natrona Heights, US
★★★★★ 3
NOT INDESTRUCTIBLE
NOT INDESTRUCTIBLE
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Reviewed in the United States on May 3, 2026
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Kindle Customer
Massapequa, US
★★★★★ 5
Gorgeous
Color: Rose Gold
Gives the skin a gorgeous glow. Not oily at all. Simply beautiful!
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Reviewed in the United States on May 8, 2026

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