Exclusive to Mace Engineering, here we have our design-registered lower manifold insulator to suit the Holden VX and VY series, fitted with an Ecotec L36 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 out 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 manifold insulator will conduct up to an amazing 3,448 times less heat depending on the size chosen.

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.

Dyno Results:

The following test was conducted on a 1996 Holden Commodore VS with head and cam work. Normally the problem of low down torque is made worse when you stick a larger cam (with more overlap) in any engine as you effectively shift the power band. However by looking at the graph, we can see that power produced down low had increased by a staggering 10% using only our 12mm manifold insulator, with top-end increasing by a further 2kw at the rears! Please note that these results don't reflect the true nature of the on road gains given the lack of actual airflow, which further drop inlet temps.

Under normal driving conditions the plenum (upper manifold), with the insulator in place, becomes cool enough to comfortably touch. Unlike before, without the manifold insulator under the same driving conditions, making it very difficult to touch without getting burned!

POWER RUN, BEFORE AND AFTER MANIFOLD INSULATOR

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 Manifold insulator

​Vehicle Fitment Guide

Parts Guide

Please select the part number you require from the drop down menu by utilising our vehicle fitment guide and parts guide.

Notes:

• Longer bolts are required for the installation of these manifold insulators.
• To achieve optimum performance on a naturally aspirated engine, we recommend running a 25mm manifold insulator and a 12mm plenum spacer. However, for forced induction (side mount supercharger or turbo) we recommend running a 12mm manifold insulator and a 25mm plenum spacer.
• Please confirm your intake runner profile prior to purchase as there was a design change in later model engines.
• Manifold insulator for WH Caprice/Statesman released before August 2000 can be purchased through another listing.

The Rollmaster Gold series timing chain kit is manufactured to exacting standards using billet steel for both the crank and camshaft sprockets. This kit comes with 9-keyway crankshaft sprockets to allow more adjustment for dialling in the cam. Crankshaft sprocket keyways are in 2 degree increments always unless otherwise stated. The relationship from crank keyway to camshaft sprocket timing is 2:1 meaning that the amount of advance or retard at the camshaft is in one degree increments i.e. 1, 2, 3 or 4 degrees. Multiple keyways are a solid fixture and do not tend to move or work lose like offset dowels, thus providing a positive locking of the cam timing to the desired position.

Rollmaster timing chain kit is light weight but stronger than any other kit available due to the weight savings of billet steel and CNC machinery. Rolling resistance is also substantially decreased on the cam gear with the use of a Torrington thrust bearing. No additional machining is required to fit this kit and there is no need for offset bushings or drilling of cam gears. 

All Gold series timing chain kits feature a billet steel construction with nitrided sprockets for added strength and Rollmaster's own pro series Iwis full roller timing chain. This chain kit is ideal for high performance applications where the chain is exposed to constant shock loading and rapid acceleration/deceleration rates.

Contents:

• 1 X Double row timing chain
• 1 X 3 Bolt camshaft sprocket
• 1 X Crankshaft sprocket
• 1 X Oil pump drive
• 1 X Torrington bearing
• 2 X Oil pump spacer
• 4 X Bolt
• 4 X Washer

Vehicle Fitment Guide

Notes:

• The image is for illustrative purposes only.
• Red series chain kits for standard upgrades can be purchased through other listings. 
• Timing cover will require minor linishing to allow extra clearance for double row timing chains.
• Double row timing chains are not recommended with high volume oil pumps due to clearance issues.

Mace timing chain sets are designed for use with stock cams. They have a solid-bushing chain for a true bearing surface that rolls with the sprockets, eliminating chain stretch. This timing kit includes a stock replacement crank sprocket with a single keyway.

Contents:

• 1 X 3-bolt single trigger cam sprocket
• 1 X Single keyway crank sprocket
• 1 X Roller chain

Vehicle Fitment Guide

Note: This timing chain set is not for use above 6,500 rpm.

The Rollmaster Red series timing chain kit is manufactured to exacting standards using billet steel for both the crank and camshaft sprockets. This kit comes with 9-keyway crankshaft sprocket to allow more adjustment for dialling in the cam. Crankshaft sprocket keyways are in 2 degree increments always unless otherwise stated. The relationship from crank keyway to camshaft sprocket timing is 2:1 meaning that the amount of advance or retard at the camshaft is in one degree increments i.e. 1, 2, 3 or 4 degrees. Multiple keyways are a solid fixture and do not tend to move or work lose like offset dowels, thus providing a positive locking of the cam timing to the desired position.

Rollmaster timing chain kit is light weight but stronger than any other kit available due to the weight savings of billet steel and CNC machinery. Rolling resistance is also substantially decreased on the cam gear with the use of a Torrington thrust bearing. No additional machining is required to fit this kit and there is no need for offset bushings or drilling of cam gears. 

All Red series timing chain kits come with a standard billet steel construction, induction hardened crank gear and Rollmaster's own premium grade Iwis full roller timing chain.

The chain kit is ideal as a standard replacement upgrade for mildly modified builds.

Contents:

• 1 X Timing chain (Single or Double row, refer to parts guide)
• 1 X 3 Bolt camshaft sprocket
• 1 X Crankshaft sprocket
• 1 X Oil pump drive
• 1 X Torrington bearing
• 2 X Oil pump spacer (Included in RLM812 only, refer to parts guide)
• 4 X Bolt (Included in RLM812 only, refer to parts guide)
• 4 X Washer (Included in RLM812 only, refer to parts guide)

Vehicle Fitment Guide

Parts Guide

Please select the part number you require from the drop down menu by utilising our vehicle fitment guide and parts guide.

Notes:

• The images are for illustrative purposes only.
• Heavy duty Gold series chain kits can be purchased through other listings.
• Timing cover will require minor linishing to allow extra clearance for double row timing chain.
• High volume oil pumps are not compatible with double row timing chain due to clearance issues.

This standard replacement timing chain kit is designed to meet and exceed OEM specifications when it comes to performance and durability. It helps restore lost horsepower and quieten valve-train noise depending on how worn out your current chain set is. Timely replacement of these kits can prevent severe engine damage including bent valves, damaged pistons or, worst case, an engine replacement. Each kit has been checked and tested so you can be assured of quality fitment every time. This suits a range of Commodores and similar platforms fitted with the 3.8L Ecotec V6 engine.

This kit comes with a 3 year/100,000km product replacement warranty.

Contents:

• 1 X Timing chain
• 1 X Cam gear
• 1 X Crank gear
• 1 X Tensioner

 Vehicle Fitment Guide

This pushrod set is made from seamless high carbon material and are a one piece design with a 5/16" ball-type end. These pushrods are heat treated to a hardness for increased strength and rigidity.

This pushrod set suits Holden vehicles fitted with Ecotec L36 and L67 Supercharged V6 engines.

Contents:

• 12 X Crow Cams pushrod

Vehicle Fitment Guide

Parts Guide

Note: Pushrod length is generally influenced by block deck height, rocker ratio, small base-circle cams and milled cylinder heads. If any of these components have been modified, a custom length pushrod may be required. We have a variety of lengths available to cater for different builds. We recommend using a pushrod length checker to verify the appropriate length.

NPR® (Nippon Piston Ring) was established in 1931 and have six manufacturing plants in Japan and further 9 plants in USA, Europe and Asia employing 2310 staff. NPR® is recognized as a world leading manufacturer and is original equipment to major Japanese and European automotive companies. 

NPR's unrivalled piston rings are manufactured to exacting specifications so proper fit and clearance is achieved. When it comes to enduring the extreme conditions that occur in the combustion chamber while performing such functions as sealing, heat dissipation and oil control, there's no better option than Nippon rings. Perfect for standard rebuilds and lightly modified vehicles.

Contents:

• 1 X Nippon piston ring set

Vehicle Fitment Guide

Parts Guide

Please select the part number you require from the drop down menu by utilising our vehicle fitment guide and parts guide.

Notes:

• Pistons suited to these piston rings can be purchased through another listing.
• The image is for illustrative purposes only.

This Platinum thermostat gasket has been produced to OE specifications and suits all Holden vehicles fitted with Buick L27 & Ecotec L36 3.8L V6 engines.

Contents:

• 1 X Thermostat gasket

Vehicle Fitment Guide

Note: The image is for illustrative purposes only.

This V6 main cap girdle is designed to reduce "capwalk", stop block web flexing and eliminate cracking of the main caps/block webs; this is achieved by boxing in the main caps. Our light weight girdle evenly distributes load and dampens harmonics by bolting the main cap studs together to create a super strong rectangular cage. The brace nearly doubles the main web support area in the engine. Securing the loose end of the main studs provides stability unequaled even by a 4-bolt mains setup.

In addition, due to the close proximity of the main stud girdle to the crankshaft and rods it also aids in stripping oil off of the crank, which in itself yields a net gain in HP.

Fabricated from 16mm thick high strength aluminium, these girdles are ideal for use in high rpm/high horsepower applications where block rigidity is critical.

Contents:

• 1 X Main cap girdle

Vehicle Fitment Guide

Notes:

• The girdle will require slight modification for a perfect fit. Generally speaking, the oil pick up will require lengthening, and small sections of the block/girdle will require slight modification to prevent/alleviate any fouling.
• Worst case scenario, if there is a large variance with the block you are using, the girdle will need to be skimmed to make the mating surfaces flush again.
• Custom length main studs are required. These can be purchased from any authorized ARP dealer.