SKU: 58893890624

MACE 6.35MM PERF. MANIFOLD INSULATOR TO SUIT HOLDEN CALAIS VS VT VX VY L67 SUPERCHARGED 3.8L V6

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Ships within 48 hours · Estimated delivery Jul 23 - Jul 28

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Description

MACE 6.35MM PERF. MANIFOLD INSULATOR TO SUIT HOLDEN CALAIS VS VT VX VY 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: 58893890624

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Lacey Killion
Draper, US
★★★★★ 1
Cutting boards will splinter
A lot of the reviews that are saying these wooden boards splinter are true. I was excited to find some nontoxic wooden cutting boards for such a great price. Upon arrival, they seemed pretty decent quality when I pulled them out of the package. I proceeded to use the large one so I gave it a quick rinse with warm water and was taken back by fumes coming off the cutting board and then wiped it down with a white paper towel and my paper towel was brown. I was a little discouraged, but decided to give it a better rinse with a soap, free brush. At that point once I dried it off whatever coding was on it came off and it was rough and splinters everywhere. Definitely a little upset that the splinters could’ve ended up in our food. These are not good quality non-toxic cutting boards I would rather spend a little extra money on a quality board that is not going to sprinter Wood shavings into my food.
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Reviewed in the United States on May 23, 2026
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Verified Purchase
Lorenzo Vhee
Draper, US
★★★★★ 5
Very good, just be sure not to leave in water
Overall, this is a very good product as my wife and I are moving towards non-toxic kitchen materials. My only advice is to make sure to not leave this submerged in water otherwise mold will easily form.
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Reviewed in the United States on December 27, 2025
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Verified Purchase
Anonymous123
Charlottesville, US
★★★★★ 4
Truly non-toxic but a little rough and uneven
I’m very impressed with the packaging of this. When I first opened the box I was shocked that there was a plastic wrapping around the boards when they promised to be non toxic but then I saw the sticker that the wrapping was not plastic and I was very happy. The boards themselves are pretty nice and a good thickness but the only thing is I feel like the board is a little rough and parts of the board come up and are not smooth.
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Reviewed in the United States on April 7, 2026
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TracyAZ
Houston, 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
Carnegie, 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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