This standard replacement Mace oil pump kit suits all Commodores powered by the 3.8L Buick V6. It meets and exceeds all OEM specifications so you can be assured of quality fitment and performance every time. The Premium quality machine thinner oil pump cover available with this kit allows extra clearance for your double row timing chain kit with its precision ground finish and durable coating.

Contents:

• 1 X Oil pump cover (refer to Parts Guide)
• 1 X Oil pump internal gear
• 1 X Oil pump external gear
• 2 X Oil pressure relief valve
• 2 X Oil pump pressure relief spring
• 5 X Oil pump cover to timing cover bolt

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.

Note: The machine thinner oil pump cover screw torque is 11 N.m. It can also be separately purchased through another listing.

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 and minor head work 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.

This complete engine gasket kit to suit the Holden 5L EFI V8 has been developed to meet such rigorous requirements. More suited to high performance builds, the contents of this kit has been engineered, designed and manufactured right here in Australia to exacting tolerances to deliver the highest levels of uncompromising quality. This kit can also be used in standard rebuilds for enhanced sealing and fitment characteristics.

Contents:

• 1 X Timing cover gasket
• 1 X Water pump to block gasket
• 1 X Oil pump gasket
• 1 X Fuel pump gasket
• 1 X Water outlet gasket
• 1 X Distributor O-ring
• 1 X Oil pan gasket
• 1 X Throttle body gasket
• 1 X Inlet manifold seal
• 1 X Sump rear gasket
• 1 X Sump front gasket
• 1 X Timing cover oil seal
• 2 X Inlet manifold gasket
• 2 X Extractor gasket
• 2 X Head gasket
• 2 X Valve cover gasket
• 2 X Rear main bearing seal
• 4 X Valve cover grommet
• 16 X Valve stem seal

Vehicle Fitment Guide

Note: 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 Buick LN3 and L27 V6 engines.

Contents:

• 16 X Head bolt

Vehicle Fitment Guide

Note: Like most factory head bolts, these also are TTY (torque-to-yield) meaning replacement is an absolute necessity once they have been elongated beyond their elastic limit.

This high quality bottom end gasket kit is ideal for engine rebuilds or just replacing worn and leaky gaskets. This suits a range of Commodores and similar platforms fitted with the Holden V8 engine.

Contents:

• 1 X Timing cover seal
• 1 X Timing cover gasket
• 1 X Water pump gasket
• 1 X Rope rear main seal
• 2 X Oil pump gasket
• 1 X Relief valve fibre washer
• 1 X Oil pump pickup gasket
• 1 X Sump gasket
• 1 X Oil drain plug fibre washer

Vehicle Fitment Guide

Note: Image is for illustrative purposes only.

Originally developed for demanding race applications, K&N's Premium Wrench-Off Oil Filter has become a favourite among consumers for its durability and easy removal. To satisfy the demands of racers, these oil filters have many features over and above the requirements of most vehicles. These features include but are not limited to the use of thicker canister walls for extra strength and durability which reduces the risk of damage from loose rocks and debris, a drilled hole on the nut to provide for safety wire attachment and the use of a resin impregnated cellulose filter media which allows for higher flow rates while providing outstanding filtration.

Key Features: 

• Resin-impregnated filter media traps 99% of harmful contaminants.
• 1 inch exposed nut designed for easy oil filter removal.
• Heavy duty construction for extreme conditions.
• Anti-drain back valve (where applicable) eliminates dry starts, prevents oil from draining back into crankcase during engine shutdown.

Vehicle Fitment Guide

This Platinum premium valve regrind gasket set (VRS) is designed to meet and exceed OEM specifications. Each item of this kit has been checked and evaluated, so you can be assured of quality fitment every time. This suits a range of Commodores and similar platforms fitted with the Holden V8 engine.

This kit includes every gasket and seal from the cylinder heads up.

Vehicle Fitment Guide

Note: Image is for display purposes only.