This Platinum plenum chamber gasket set provides protection against any possible vacuum leakage and potential power loss. These seals sit between the plenum cover and intake manifold, and over time, the factory rubber can perish causing sealing issues. This is a small price to pay to make sure that your engine is always performing at its best. It is also a good idea to replace the factory seal winstalling one of our popular plenum spacers.

This plenum chamber gasket set suits Holden vehicles fitted with Ecotec L36 V6 engine.

Contents:

• 1 X Plenum chamber gasket set

Vehicle Fitment Guide

Note: Platinum plenum chamber gasket set to suit Holden Ecotec L36 3.8L V6 from VT.II series onwards can be purchased through another listing.

These Mace MLS (Multi-Layer Steel) head gaskets are comprised of five layers of steel. The outer layers are an embossed viton coated stainless steel providing a superior seal with excellent rebound characteristics and corrosion resistance. MLS head gaskets reduce bore distortion and withstand extreme cylinder pressures. These can be used as standard replacement head gaskets but are more suited to higher calibre builds.

A surface finish of 50 RA (roughness average) or finer, is recommended on the head and block for a proper gasket seal. Anything rougher may conflict with the gasket design.

Specifications:

• Bore size: 3.84''
• Thickness: 0.066"

Contents:

• 1 X Cylinder head gasket set

Vehicle Fitment Guide

Notes:

• The image is for illustrative purposes only.
• It is highly recommended copper coat is used when installing these gaskets.
• Standard bore size is 3.80" so ideally, these gaskets would be more suited for oversized bores. However, they are still compatible with standard size. We have other listings for MLS gaskets that specifically suit standard size.

We have formed a series of high-performance camshaft and memcal packages for your VS.III and VT.I Holden 5L V8. Designed to deliver real-world horsepower gains of up to 35%, our cams are intended to wake your 304 right up and put the enjoyment back into driving.

Stage 3 Kit: Improved top end power 
This camshaft kit must be used in conjunction with a full free-flowing exhaust system and minor head work for maximum performance. It provides a power gain of 35% between 2000 and 6500rpm. Despite the excellent high-performance characteristics of this package, the engine remains tractable and responsive at low speed while adopting that old-school choppy idle. A standard torque converter can be used on automatic-equipped vehicles but we recommend a 2000rpm stall converter to enhance acceleration.

Contents:

• 01 X High performance camshaft
• 01 X Tailor made memcal
• 16 X Crow Cams performance valve spring
• 32 X Crow Cams hardened valve lock

Camshaft Specifications

Vehicle Fitment Guide

Parts Guide

Please select the part number you require from the dropdown menu by utilizing our fitment guide and parts guide.

Notes:

• Memcals in these packages are calibrated by Mace and we have strict guidelines in terms of what modifications our memcals support. Your setup's compatibility will be determined on the basis of the filled out application form. In case of non-compatibility, you can either change your setup to a compatible one or we can supply you with the package without the memcal. *CLICK HERE* to download the blank application form and send it back to info@maceengineering.co.nz
• Our memcals will not be compatible with stroker kits or forced induction. For these cases it is recommended that the vehicle gets a custom dyno tune to ensure it is safe.
• Genuine broadcast memcal number (4 letter code on sticker attached to factory fitted memcal) will be required in most cases to confirm the operating system.
• Pushrod length will require checking if heads have been skimmed or block has been decked.
• We recommend dialing in all aftermarket cams using a degree wheel to ensure that they’re phased correctly with the crankshaft. You can do this by using our 8" or 11" degree wheel listed in other ads.
• Gasket kits to suit this engine can be purchased through other listings.

We have formed a series of high-performance camshaft and memcal packages for your VN - VS.II Holden 5L V8. Designed to deliver real-world horsepower gains of up to 35%, our cams are intended to wake your 304 right up and put the enjoyment back into driving.

Stage 1 Kit: Improved torque and economy
Our stage 1 kit provides a power gain of 15% between 1200 and 4200rpm. Perfect for towing, normal driving, and highway cruising. It’s also ADR compliant.

Contents:

• 01 X Crow Cams High performance camshaft
• 01 X Tailor made memcal
• 01 X Assembly lube
• 16 X Crow Cams iron lifter

Stage 2 Kit: Improved mid-range power
We recommend this kit be used in conjunction with at least a 2.5” twin cat exhaust for maximum performance. This package provides a maximum power gain of 20% between 1900 and 5000rpm. This increase has been achieved without sacrificing any noticeable low-end torque or drivability. This kit can also be ADR compliant.

Contents:

• 01 X Crow Cams High performance camshaft
• 01 X Tailor made memcal
• 01 X Assembly lube
• 16 X Crow Cams iron lifter
• 16 X Crow Cams performance valve spring

Stage 3 Kit: Improved top end power
This camshaft kit must be used in conjunction with a full free-flowing exhaust system. Minor head work is optional for maximum performance. It provides a power gain of 35% between 2400 and 5500rpm. Despite the excellent high-performance characteristics of this package, the engine remains tractable and responsive at low speed while adopting that old-school choppy idle. A standard torque converter can be used on automatic-equipped vehicles but we recommend a 2000rpm stall converter to enhance acceleration.

Contents:

• 01 X Crow Cams High performance camshaft
• 01 X Tailor made memcal
• 01 X Assembly lube
• 16 X Crow Cams iron lifter
• 16 X Crow Cams performance valve spring
• 32 X Crow Cams hardened valve lock

Camshaft Specifications

Vehicle Fitment Guide

Parts Guide

Please select the part number you require from the dropdown menu by utilizing our fitment guide and parts guide.

Notes:

• Memcals in these packages are calibrated by Mace and we have strict guidelines in terms of what modifications our memcals support. Your setup's compatibility will be determined on the basis of the filled out application form. In case of non-compatibility, you can either change your setup to a compatible one or we can supply you with the package without the memcal. *CLICK HERE* to download the blank application form and send it back to info@maceengineering.com.au
• Our memcals will not be compatible with stroker kits or forced induction. For these cases it is recommended that the vehicle gets a custom dyno tune to ensure it is safe.
• Genuine broadcast memcal number (4 letter code on sticker attached to factory fitted memcal) will be required in most cases to confirm the operating system.
• Pushrod length will require checking if heads have been skimmed or block has been decked.
• We recommend dialing in all aftermarket cams using a degree wheel to ensure that they’re phased correctly with the crankshaft. You can do this by using our 8" or 11" degree wheel listed in other ads.
• Gasket kits to suit this engine can be purchased through other listings.
• The images are for illustrative purposes only.

Stage 1

This cam is designed for use on totally stock heads and stock components up to 6000 rpm. It is recommended to upgrade valve springs to increase performance and allow shifting over 6000 where peak power is made. PCM programming required. Expect gains of 26-37kW depending on your car's current configuration.

Stage 2

This cam is designed for supercharged or nitrous applications on ecotec and L67 bottom ends. It produces the highest power and torque figures than any cam grind currently available with stock heads. An even smaller pulley can be used compared to CAM604. Peak power is 200rpm higher than CAM604. Upgraded valvetrain is mandatory (cam packages available through another ad). PCM programming required. Expect gains of 30-45kW depending on your car's current configuration.

Stage 3

This cam is not for the fainthearted! CAM606 was developed to maximize the HP of an L67 in an all out build i.e stroked, balanced, blueprinted, etc. CAM606 requires ported heads with machined valve guides and a complete valvetrain upgrade. Given the base circle diameter varies between lobes custom length pushrods are also required (cam packages available through another ad). PCM programming essential. No other cam makes the power of this cam in a 3.8L, period. Idle is similar to CAM605 with roughly 13 inches of vacuum. Expect gains of 40+kW depending on your car's current configuration.

Camshaft Specifications

Vehicle Fitment Guide

Parts Guide

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

Notes:

• Valve lifts are based on factory rocker ratio of 1.6:1.
• The image is for illustrative purposes only.

Head bolts play a vital role in the sealing of the combustion chamber, oil/coolant channels and ambient air. Therefore, we recommend our Mahle cylinder head bolt set for the task. Having met and exceeded OEM specifications, these quality bolts are suited for standard and mildly modified applications. These are torque-to-yield (TTY) bolts which means they are designed to be tightened past their elastic limit, guaranteeing high and uniform clamping forces. Other benefits include pre-applied sealant to the threads eliminating the use of thread locker and no-retorquing is necessary after correct installation procedures have been followed.

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

Contents:

• 16 X Head bolt

Vehicle Fitment Guide

Notes: 

• When torquing up bolts, an accurate torque wrench or angle gauge will be required to achieve correct clamping forces.
• Please follow the torque specifications as recommended by the service manual.
• TTY bolts are only to be used once due to permanent elongation and safety concerns.

Due to extended exposure of high temperatures, it is very common for the valve cover gaskets on any motor to eventually become brittle and break, especially on the Holden V8. If the problem is left un-attended, the engine bay ends up looking like a mess, worst case, engine damage will result due to oil loss.
This replacement pair of rocker cover gaskets perfectly seals the covers to the cylinder heads and meets all OEM specifications. These gaskets have been manufactured from high grade automotive materials to ensure trouble-free motoring for all applications.

Vehicle Fitment Guide

Notes:

• VL-VR EFi 5.0L V8s use paper rocker cover gaskets while VS-VT EFi 5.0L V8s use a moulded rubber rocker cover gasket. Unfortunately the cylinder head castings are different with the earlier cylinder head having a wider rocker cover rail. This wider rail does not allow the later rubber type gasket to fit snugly onto the cylinder head and causes the gasket to bulge out of place. This bulging can cause the gasket to be pinched when fitting the rocker cover in place and result in improper sealing.
• Earlier model gaskets can be purchased through another ad.​

These Mace replacement piston rings for 304 5.0L V8 are made in America. Each piston ring has been checked and tested so you can be assured of quality fitment every time. This is a premium replacement piston ring set to suit standard rebuilds.

Specifications:

• Comes with standard, 0.020", 0.030", 0.040", 0.060" oversize
• Compression ring widths: Top 1.5mm / Lower 1.5mm
• Oil ring width: 4.0mm
• Material: Molybdenum (Moly)

Contents:

• 1 X Piston ring set

Vehicle Fitment Guide

Parts Guide

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

Notes: 

• These piston rings are suitable for aftermarket pistons only.
• Piston set to suit Holden 304 5.0L V8 can be purchased through another listing.

These Mace pistons are manufactured using silicon alloy combined with T6 heat treatment to achieve a reliable motor to provide maximum durability, strength and damage/scuff resistance. Great for standard rebuilds or lightly modified setups.The flat top design allows an increase in compression ratio which gives the engine a boost in power over the standard pistons. These pistons come in a variety of sizes to suit all common overbore sizes.

This Piston set suits Holden Commodores and similar platforms fitted with the 304 V8 engine.

Specifications:

• Piston type: Flat top
• Compression height: 1.710''
• Pin type: Press fit
• Improved anodised crown with moly coated skirt.

Vehicle Fitment Guide

Parts Guide

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

Note: The rings used with these pistons are 1.5 x 1.5 x 4.0mm chrome or molybdenum (moly), which can be purchased through other listings.

Dayco’s automatic belt tensioner maintains proper belt tension throughout the belt drive by incorporating an automatic, spring-loaded tensioner into the drive system geometry. It features a patented “flat spring” design that’s engineered to provide less operating range variations in tension. This reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed. It also lessens the risk of belt squeal and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear. A Teflon strip wound within the spring resists abrasion. The flat spring itself is coated to resist rust.

Other superior design features include:

• A heavy-duty cast aluminium spring case resists cracking and fatigue.
• A heavy-duty cast aluminium arm offers additional strength and less distortion.
• An aluminium retainer ring locks the spring case and arm together, and seals against corrosion.
• A thermoplastic rubber “spring slot plug” keeps out harmful contaminants.
• The lubricated nylon “pivot tube bushing” and “spring bushing” promote quieter performance.
• A rubber “O” ring seals against dust and grime.
• The zinc coated mounting bolt resists rust, and is concentric for a more even degree of constant tension.

In order to meet OEM performance standards, this Dayco automatic tensioner comes with a steel pulley that features a dust cover to protect against contaminants.

Vehicle Fitment Guide