SKU: 69275350983

MACE 25MM PERFORMANCE MANIFOLD INSULATOR KIT TO SUIT HOLDEN L67 SUPERCHARGED 3.8L V6

Sale price$91.80 Regular price$102.00
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Ships within 48 hours · Estimated delivery Jul 23 - Jul 28

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Description

MACE 25MM PERFORMANCE MANIFOLD INSULATOR KIT TO SUIT HOLDEN 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 25mm manifold insulator will conduct an amazing 3,448 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 25mm Manifold insulator
  • 1 X Set of longer bolts
  • 1 X 25mm fuel injector extender kit
  • 1 X Gasket sealer

Vehicle Fitment Guide

 

Notes:

  • A 6.35mm 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: 69275350983

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Lyndsie Smyser
Chelsea, US
★★★★★ 5
Incredible quality!!!
Color: Black/Black
We have had these for a little over three months and so far they are still working fantastically. We are amazed at the quality for the price. It makes grinding fresh salt and pepper so easy! Perfect for cooking and topping food.
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Reviewed in the United States on May 23, 2026
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Celio Pereira
Louisville, US
★★★★★ 5
Works well, just wish it was rechargeable
Color: Stainless Steel
These grinders work pretty well and are really convenient to use with one hand while cooking. The adjustable coarseness is nice and the LED light actually helps more than I expected. They seem well made and hold a good amount, just wish they were rechargeable instead of using batteries. Still happy with them overall.
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Reviewed in the United States on May 26, 2026
D
Verified Purchase
Denise Esau
Omaha, US
★★★★★ 5
Great value
Color: Black/Black
Great value,great product,easy to use. Highly recommend. Grinding performance excellent.
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Reviewed in the United States on May 27, 2026
I
Verified Purchase
IMkirok
Bozeman, US
★★★★★ 5
More than a daily grind
Color: Purple
We are very happy so far, working very well. The grind is even and easy to adjust with a simple turn of the screw on the base of the grinder. The automatic light is a nice feature, especially as I am 66 and my eyes are not what they used to be. Once I turned the on button to face front, I'm no longer triggering a grind just by picking these up. (our last grinders trigger was on the top of the unit}. They feel well constructed and are easy to fill. My wife absolutely loves the color (purple). will update this in a couple months for durability, but for the price so far (1 month) 5 stars
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Reviewed in the United States on April 12, 2026
M
Verified Purchase
Mom of Boys
New York, US
★★★★★ 4
Electric grinders
Color: Black/Black
Easy to refill. We use pink Himalayan salt and the grinder does well. It seems to struggle a bit with the peppercorns bit still gets the job done. The light is nice. We have enjoyed the ease of use. It also looks nice on the counter. The holder is great as it catches any fine debris after use. I purchased this one as it uses actual batteries and not something else I have to charge. They have been used daily for 2 months and have not needed to change the batteries yet.
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Reviewed in the United States on March 28, 2026

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