NPR® (Nippon Piston Ring) was established in 1931 and have six manufacturing plants in Japan and a 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 unrivaled 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.

Specifications:

• Piston ring widths: 1.2mm X 1.5mm X 2.0mm
• Top ring material: Chrome
• Ring surface treatment: Gas nitrided and ferrox coated

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:

• For L67 engine, both OEM and aftermarket pistons use 2mm oil rings.
• For Ecotec L36's aftermarket pistons, 3mm oil rings are recommended and can be purchased through another listing.
• Please refer to the manufacturer's specifications for the correct installation.
• The image is for illustrative purposes only.

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

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 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 when installing 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 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.

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.