SKU: 75376488943

MACE PERFORMANCE 12MM MANIFOLD INSULATOR TO SUIT FORD TBI MPFI SOHC INTECH VCT 3.2L 3.9L 4.0L I6

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Description

MACE PERFORMANCE 12MM MANIFOLD INSULATOR TO SUIT FORD TBI MPFI SOHC INTECH VCT 3.2L 3.9L 4.0L I6Exclusive to Mace Engineering, our design registered manifold insulator to suit Ford 6 cylinder engines from EA to AU What are manifold insulators and what do they do? Manifold insulators are a thermal insulating spacer that mounts between your upper and lower intake manifold. Made from a heat blocking composite, our manifold insulators will increase power from your engine by keeping the intake cooler, and increase low end torque by increasing runner

Exclusive to Mace Engineering, our design-registered manifold insulator to suit Ford 6 cylinder engines from EA to AU

 

What are manifold insulators and what do they do?

Manifold insulators are a thermal insulating spacer that mounts between your upper and lower intake manifold. Made from a heat blocking composite, our manifold insulators will increase power from your engine by keeping the intake cooler, and increase low end torque by increasing runner length.

 

 

But how do manifold insulators keep the intake manifold cooler?

Given our manifold insulators are made from a composite material with a thermal conductivity of 0.29 W/m*K as opposed to aluminium, which has a thermal conductivity of 150 W/m*K; The difference works about to be that aluminium conducts heat 500 times higher then our composite material!

Also, with gaskets often made out of steel (20 W/m*K thermal conductivity), placed between the upper and lower manifolds, replacing a .5mm gasket with a 12mm manifold insulator will conduct an amazing 1087 times less heat (yes, that's over 100,000% reduction!). What this basically means is that it becomes very difficult for the engine to heat up the manifold, which ultimately means more power for extended periods (i.e. considerably fewer heat soak issues, which is especially noticeable on turbocharged cars)!

Our composite material also exhibits high stiffness and compressive strength, can withstand temperatures up to nearly 150C, and has a thermal expansion coefficient very similar to aluminium to increase sealing capabilities. In addition, the spacer can also withstand boosted conditions with ease.

 

Key Benefits:

  • Produces a cooler intake and intake manifold charge resulting in more power.
  • A cooler intake charge also reduces the tendency for detonation, meaning more ignition timing or boost for more power.
  • Improvelow endtorque by increasing runner length.
  • Better fuel economy.
  • Reusable over and over again.
  • No undesirable side effects.

 

Contents:

  • 01 X Performance manifold insulator
  • 01 X Bolt pack
  • 01 X Gasket maker

Vehicle Fitment Guide

 

Contents:

  • 01 X Performance manifold insulator
  • 01 X Bolt pack
  • 01 X Gasket maker

 

What about Installation?

Installation is verystraight forward, requiring only the removal of your inlet manifold to install the manifold insulator.

 

Note: Does not include intake manifold.

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: 75376488943

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SM
Lexington, US
★★★★★ 5
Great purchase
Material Type: Recycled Polyester, Color: Dark Navy, Size: X-Large
Purchased several shirts, all were great quality. You never know what you’ll get when you purchase sight unseen, these are worth it. Great value, style, and comfort. Color is exactly what you see online. True to size.
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Reviewed in the United States on November 25, 2025
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Jocelyn
Whiting, US
★★★★★ 4
Great quality for price
Material Type: Recycled Polyester, Color: Red Stripe, Size: XX-Large
Very impressed with the shirt quality, especially for such a low price. Sizing is accurate.
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Reviewed in the United States on May 21, 2026
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Shawn SnoMan Thompson
New York, US
★★★★★ 5
For work or casual wear, this polo is a great choice.
Material Type: Recycled Polyester, Color: Port Stripe, Size: X-Large
I really like this polo. I've been wearing it once a week or every other week since November. Its very comfortable and breathable. This polo feels like it should last a while. The fit is good. I typcally wear XL and this XL fits great. I've pruchased it in both burgundy and black so far. I definitely recommend this shirt. For work or casual wear, this will look good.
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Reviewed in the United States on January 11, 2026
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Tech Dad
Grantham, US
★★★★★ 5
Great value: These are my go-to work from home shirt
Material Type: Recycled Polyester, Color: Blue, Size: X-Large
I’ve been pleasantly surprised by these shirts and wear them weekly for Zoom calls, since I’m still working from home these days. I figured at the price point it was worth trying them out, and now I’ve bought several in different colors. They aren’t super soft, but they are comfy and look nice. I’m 6’1” ~220 pounds, and the XL slim fit still has plenty of room. I imagine the regular cut is incredibly boxy and oversized. The difference between polyester vs recycled polyester is inconsequential. I typically buy expensive golf shirts, and these definitely aren’t as nice. They are a fraction of the cost though and a great “beater” work shirt / hang out shirt. It’s nice wearing something that looks and feels decent, but if something happens to it, you can toss and it and pick up another for the cost of a chipotle burrito.
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Reviewed in the United States on May 29, 2022
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Espresso
Los Angeles, US
★★★★★ 3
Great price, not great quality
Material Type: Recycled Polyester, Color: Black, Size: Small
Simple, straight forward all black polo. I am a size medium woman (with some room since I don't like form-fitting) and bought a men's small. Fits perfectly for my frame. Long enough to tuck in for my part-time extra weekend job uniform. Also suitable for the golf course. A little thin, and if you hold it up to light you can sort of see through it. *Not* flowy, soft and smooth fabric like a rash guard/sun shirt - more structured than that. But it's cool and does the job for the price under $10.
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Reviewed in the United States on August 13, 2024

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