SKU: 12835143178

MACE PERFORMANCE 6.35MM PLENUM SPACER TO SUIT FORD FALCON BA BF FG BOSS 260 290 5.4L V8

Sale price$63.00 Regular price$70.00
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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 FORD FALCON BA BF FG BOSS 260 290 5.4L V8Exclusive to Mace Engineering is our design registered plenum spacer to suit the Ford Boss 260 and 290 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

Exclusive to Mace Engineering is our design-registered plenum spacer to suit the Ford Boss 260 and 290 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: 12835143178

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t. cooper
Draper, US
★★★★★ 5
Start Juicing with this baby
Color: Silver
Wow, if you need a juicer, get this one...easy to use, quality built, and great price point.
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Reviewed in the United States on May 13, 2026
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Shay K.
Port Orchard, US
★★★★★ 4
Great price!
Color: Silver
For the price I'm extremely happy with this juicer! Easy to clean! I will say it's a little difficult to make large batches with this juicer. I just keep a pitcher beside me and dump the container when it gets full. I do find myself cleaning the grater a few times while I'm juicing because it does tend to get clogged. If you're new at juicing and want to try it...get this! Totally worth it! Gets the job done. I've used mine several times so far, but still can't see myself paying $300+ for a juicer.
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Reviewed in the United States on April 24, 2026
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Sandra Fernández Almeida
Chelsea, US
★★★★★ 5
Powerful Juicer for Fresh Drinks
Color: Silver
This juicer works great and extracts juice quickly and efficiently. It handles fruits and vegetables very well, and the juice comes out smooth. The machine is easy to assemble and clean, which is a big plus. Perfect for making fresh, healthy drinks at home.
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Reviewed in the United States on April 27, 2026
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Catzee Gonzalez
West Palm Beach, US
★★★★★ 5
Love my juicer
Color: Silver
This juicer is amazing easy cleaning zero leaking makes no mess really easy use. The design on this juicer is more than perfect.
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Reviewed in the United States on May 17, 2026
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Lanaya thomas
Natrona Heights, US
★★★★★ 3
Not that great
Color: Silver
Not bad for the price but it leaves a lot of pulp behind and I don’t like that it could be better but again decent for the price easy to use you just have to strain the juice a lot to get all the pulp out and once you do it’s like 60% pulp 40% juice when you go in the back to look at or throw out the juiced fruit you can feel how much juice is still in it
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Reviewed in the United States on April 18, 2026

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