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 2 - CAM649

Performance based cam for standard engines. Provides good mid-range power tailored for spirited street enthusiasts. A full exhaust system, cold air intake, valvetrain upgrade and tune post installation is recommended with this cam. Expect gains of 18-25kW depending on your car's current configuration.

Stage 3 - CAM650

Performance street/strip cam for modified engines. This cam was designed to squeeze the most out of your 3800cc Buick V6. To make full use of this cams capability, we recommend a light head work, a full exhaust system, cold air intake, valvetrain upgrade and tune post installation. Expect gains of 20-30kW depending on your car's current configuration.

Vehicle Fitment Guide

Camshafts Specifications

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

Notes:

• Pushrod length will require checking if heads have been skimmed or block has been decked.
• Dyno tune is required post installation on stage 2 and 3 cams. In some cases we may be able to supply a tune to suit. Please refer to our cam and chip packages through another listing.
• 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.
• Removing the timing cover may upset the sump gasket depending on certain models. We stock cork and metal sump gaskets if yours cannot be re-used.
• We have all gaskets available through other ads.
• The image is for illustrative purposes only.

Due to extended exposure to 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 unattended, the engine bay ends up looking like a mess, worst case, engine damage will result due to oil loss.
This replacement pair of paper 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.
• Later 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.

The Powerbond OEM replacement harmonic balancer is a complete unit designed to OEM specifications, making use of only high quality materials such as high grade SG Iron castings, with either bonded or inserted rubber as used in OEM balancers.

Vehicle Fitment Guide

Note: Powerbond OEM replacement harmonic balancer to suit VN Series I with Buick LN3 3.8L V6 engine can be purchased through another listing.

The Powerbond OEM replacement harmonic balancer is a complete unit designed to OEM specifications, making use of only high quality materials such as high grade SG Iron castings, with either bonded or inserted rubber as used in OEM balancers.

Vehicle Fitment Guide

These King main end bearings are ideal for standard rebuilds. They are manufactured by one of the most renowned bearing specialists in the world and in turn rank highly in all related mechanical properties including anti-seizure, wear resistance and conformability. Hence, you can be assured of quality fitment and smooth operation every time.

Vehicle Fitment Guide

Parts Guide

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

Note: The image is for illustrative purposes only.

This 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

Crow Cams hydraulic roller lifters are standard replacement lifters. With refined durability, they ensure valve-train stability in the most demanding conditions. These are a replacement for stock hydraulic roller lifters and preload is to be set to OEM specifications.

Vehicle Fitment Guide