SKU: 21495883777

MACE 6.35MM PERF. MANIFOLD INSULATOR TO SUIT HOLDEN STATESMAN VS WH WK L67 SUPERCHARGED 3.8L V6

Sale price$90.00 Regular price$100.00
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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13

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Description

MACE 6.35MM PERF. MANIFOLD INSULATOR TO SUIT HOLDEN STATESMAN VS WH WK L67 SUPERCHARGED 3.8L V6Exclusive to Mace Engineering, here we have our design registered lower manifold insulatorto suit the Holden series from VS to VY fitted with L67 Supercharged 3. 8L 6 cylinder engine. What are manifold insulators and what do they do? Manifold insulators are a thermal insulating spacer that mount between your engine block and intake manifold. Made from a heat blocking composite, our manifold insulators will increase power from your engine by keeping

Exclusive to Mace Engineering, here we have our design-registered lower manifold insulatorto suit the Holden series from VS to VY fitted with L67 Supercharged 3.8L 6 cylinder engine.

 

What are manifold insulators and what do they do?

Manifold insulators are a thermal insulating spacer that mount between your engine block and 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 than our composite material!

Also, with gaskets often made out of steel (thermal conductivity of20 W/m-K) placed between the upper and lower manifolds being 0.5mm thick, replacing them with a 6.35mm manifold insulator will conduct an amazing 876 times less heat.

Our composite material also exhibits high stiffness and compressive strength, can withstand temperatures up to 150°C, 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:

  • Design registered.
  • Reduces charge air temperature resulting in better power consistency and detonation prevention.
  • Power increase with no undesirable side effects.
  • Improved low end torque by increasing runner length.
  • Improved fuel economy.
  • Easy to install.
  • Can be used as a replacement gasket.
  • Reusable.
  • Proven gains at an affordable price.

 

Contents:

  • 1 X 6.35mm Manifold insulator

Vehicle Fitment Guide

 

Notes:

  • A 25mm manifold insulator can be purchased through another listing.
  • Slight modifications to the fuel rail will be needed to install this insulator.
  • The original bolts can be reused if this insulator is not used in conjunction with any intercooler.
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: 21495883777

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Cliffton Gabriel
Birmingham, US
★★★★★ 5
My boy love it
My dog's favorite toy. It's really the only thing that he will chase after. I keep buying a new one every year.
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Reviewed in the United States on April 23, 2026
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Kim
Bozeman, US
★★★★★ 5
Comfortable and fits great
Size: 9, Color: Olive
Comfortable fits great.
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Reviewed in the United States on December 11, 2025
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Meg_B
Omaha, US
★★★★★ 5
Nice quality! BF approved.
Size: 9, Color: Olive
I got these for my boyfriend and he loves them. The color green is really nice and the quality is really good. I would recommend doing a waterproof/weather treatment to them if you plan to wear them outside. His got water marks on them already and I didn't treat them. Important note: If you have narrow feet these will work great, but if you have wide feet it might be an issue. They are true to size.
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Reviewed in the United States on January 5, 2026
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Larry clark
San Leandro, US
★★★★★ 5
Great slippers, go Steelers
Size: 12, Color: Tan
I am still wearing these awesome slippers
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Reviewed in the United States on November 3, 2025
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Pauly Summers
Waukegan, US
★★★★★ 5
this slipper is a big surprise for the price.better than i expected better fit .
Size: 10, Color: Tan
slippers are way better than what i thought they would be .for the price did not expect much but better fit and comfortable than a lot of walmart and target slippers and i have bought a ton of them in the years past.do the job for me had them little over 3 weeks and going to get another pair for this price nice slipper. Paul, Maryland. ps just wanted to add had slippers 2 months now broke in really nice very comfortable most dept store slippers have fallen appart buy now good buy for the price. Paul,Maryland.
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Reviewed in the United States on July 1, 2023

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