SKU: 5532657526

MACE 25MM PERF. MANIFOLD INSULATOR KIT TO SUIT HOLDEN STATESMAN VS WH WK L67 SUPERCHARGED 3.8L V6

Sale price$91.80 Regular price$102.00
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Ships within 48 hours · Estimated delivery Jul 20 - Jul 25

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Description

MACE 25MM PERF. MANIFOLD INSULATOR KIT 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 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: 5532657526

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David S.
Charlottesville, US
★★★★★ 5
This Solenoid is an adequate OEM replacement, at an incredible, low price.
Size: PP67-712 V1
This solenoid replaced a bad 350 Chev. Mercruiser starter Solenoid. It works perfectly with only a minor, simple modification of the mounting bracket . (Hole centers were slightly off needing only 1 new hole drilled on the engine bracket only. A very easy mod.) The Solenoid body itself is an exact match for the OEM and works flawlessly at a price that is literally 10 times less than what the Manufacturer charges.
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Reviewed in the United States on July 12, 2024
S
Verified Purchase
Shelley Weddington
Omaha, US
★★★★★ 5
works perfect
Size: PP67-712 V1
Fixed my problem and good quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 11, 2025
M
Verified Purchase
Mary B.
Chelsea, US
★★★★★ 5
Quality
Size: PP67-712 V1
Good as original quality. Heavy not lite like others
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Reviewed in the United States on March 6, 2026
N
Verified Purchase
Nicole Davidson
Grantham, US
★★★★★ 5
Great for 50hp Mercury
Size: PP67-712 V1
This is the right fit and has been working great on our pontoon.
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Reviewed in the United States on January 11, 2025
M
Verified Purchase
Missy
Battle Creek, US
★★★★★ 4
good item
Size: PP67-712 V1
arrived on time , haven't installed as of yet, will add comments once installed but looks like it is what I need and was as described .
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Reviewed in the United States on June 21, 2019

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