SKU: 49591111788

MACE 12MM UPPER MANIFOLD INSULATOR KIT TO SUIT HOLDEN RB30E 3.0L I6

Sale price$95.40 Regular price$106.00
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Description

MACE 12MM UPPER MANIFOLD INSULATOR KIT TO SUIT HOLDEN RB30E 3.0L I6Exclusive to Mace Engineering, here we have our design registered upper manifold insulator to suit Holden Commodores and similar platforms fitted with the RB30E I6 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

Exclusive to Mace Engineering, here we have our design-registered upper manifold insulator to suit Holden Commodores and similar platforms fitted with the RB30E I6 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 of 20 W/m-K) placed between the upper and lower manifolds being 0.5mm thick, replacing them with a 12mm manifold insulator will conduct an amazing 1,655 times less heat.

Our composite material also exhibits high stiffness and compressive strength, can withstand temperatures up to nearly 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 12mm Upper manifold insulator
  • 1 X Bolt pack
  • 1 X Silicon gasket maker

Vehicle Fitment Guide

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: 49591111788

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Ellen and Stephen
San Leandro, US
★★★★★ 5
Great Multi-Function Watch
Color: Gray/Digital/Gray
I absolutely love my Timex Ironman watches. I have had many over a very long period of time. Wonderful set of functions for the price. Very affordable. Easy to use. Lasts a long time. Very easy to read in standard lighting. I like the Indiglo when needed, but do not use it too often. Absolutely love the ability to set a repeat timer to remind me to do something at a fixed interval, or to keep me on task for a fixed period of time. Great to be able to set three independent alarms. Potential to capture a huge number of splits with the stopwatch. I purchased this watch to replace a similar model with a dead battery. I have replaced batteries in the past, but it is quicker and easier to buy a replacement watch. I am saving my old watches for that day in the future when the Ironman model may no longer be available. I expect this will be my watch of choice for the rest of my life.
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Reviewed in the United States on May 21, 2026
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E-Dub
Houston, US
★★★★★ 5
Just fine if you have simple needs...
Color: Black/Digital/Black/Green
Exactly what I needed: a cheap, durable wrist watch. The only thing it was lacking were instructions, but about 5 minutes of messing with the buttons got it set up
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Reviewed in the United States on May 19, 2026
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Verified Purchase
S S.
Belleville, US
★★★★★ 5
Nice watch
Color: Black/Digital/Black/Green
Good watch
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Reviewed in the United States on April 30, 2026
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Erick V Belus
Grantham, US
★★★★★ 4
Good Looking for the price.m
Color: Silver Black
This is a fashion watch people! Many people review these sub-50 dollar watches like they are supposed to be a timepiece you would hand down to your grandchildren. This is not that. If that's what you are looking for, spend more money. What this is: A decent looking inexpensive watch that is a homage to a much more expensive watch. If you expect the quality of a Brew Metric, purchase that. This keeps good time and is comfortable.
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Reviewed in the United States on October 10, 2025
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Matt
Bozeman, US
★★★★★ 3
Nice watch, cheap wristband
Color: Gold Black
The watch is nice but the wristband qualities is not up to par
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Reviewed in the United States on September 22, 2025

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