SKU: 27817757960

MACE 25MM PERF. MANIFOLD INSULATOR KIT TO SUIT HOLDEN CALAIS VS VT VX VY L67 SUPERCHARGED 3.8L V6

Sale price$91.80 Regular price$102.00
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Description

MACE 25MM PERF. MANIFOLD INSULATOR KIT 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 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: 27817757960

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★★★★★ 5
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Reviewed in the United States on March 6, 2026
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Santiago Chahwan & Dawn Yarnell
Carnegie, US
★★★★★ 5
THIN BUT SUPER SOFT
Color: White, Size: Standard(20"X 26")
Note that the fabric is thin and the pillow may show through. A plain white pillowcase underneath easily resolves this. Still a recommended buy — exceptionally soft and very inexpensive!
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Reviewed in the United States on May 30, 2026
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Colleen
Dallas, US
★★★★★ 5
Silk pillow cases that are a stitch above
Color: Beige, Size: 2 Pack Standard(20"X 26")
These pillow cases are amazing. My family loves them. Great quality. They can be machine washed. I have purchased the more expensive brands but these are made from the same silk and have the same features like a hidden zipper for a fraction of the cost. They come in a variety of colors which is also an added bonus.
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Reviewed in the United States on April 28, 2026
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barney
Louisville, US
★★★★★ 5
Best purchase in years . It actually works !!
Color: Grey, Size: King (102" X 90")
I don’t often leave reviews but this certainly justifies one . This is by far one of the best purchases I’ve made . I bought a Rest cooking comforter a few years back but couldn’t justify the cost so returned it. I now live in Florida and have to have the AC constantly on however the room would be freezing , yet my normal duvet would just trap all the heat in so I would still be so hot at night . I haven’t slept well in about 3 years since moving to Florida . I’ve now had this comforter / blanket for 3 nights and I’ve slept so well. It’s so cool to the touch and so soft . It’s the perfect weight too. I was worried it was just going to feel like a thin blanket but it’s not . I’ve managed to turn the AC up so we’re not wasting electricity and freezing our pets . A ceiling fan works perfect above . We put our standard duvet and cover over the comforter during the day to make the bed look nice and then just take it off at night. It’s crazy when you touch the standard duvet and then touch this comforter. It literally feels so cold . Well worth the money. I’m so happy with it .
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Reviewed in the United States on April 17, 2026
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Kenna Marin
Grantham, US
★★★★★ 5
An excellent all-weather option for all types of sleepers.
Color: White, Size: King (102" X 90")
I'm always freezing at night, but my boyfriend sleeps like a furnace. It's pretty difficult to find bedclothes that work for both of us. This comforter, however, is perfect. It's cool and light, not at all heavy, but it keeps us both at the perfect temperature. I was concerned that this wouldn't be enough to keep me warm in the frigid winter months, but our cold weather has finally begun and this has kept me comfortable throughout the night. I would definitely consider this perfect for use in all weather. One of my favorite things about this comforter is how well it holds up to washing. I just throw it in my washing machine on a normal setting and it cleans it perfectly. I bought this comforter in white, so a bit of bleach and it looks new and bright white every time. Unlike many comforters I've purchased in the past, this one doesn't bunch up on the inside after washing/drying. I've had several more expensive comforters that looked old and lumpy after one wash because the stuffing inside had all settled into different places, typically the corners or one side of the blanket, making it look ragged. This comforter has been washed 3 times since I purchased it and still looks just as good as it did on day one.
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