Installing a bored out throttle body is a very cost-effective way to bump up the performance of your Ecotec or L67 supercharged 3.8L V6 engine by increasing airflow by 14%.

Designed and manufactured by a team of qualified mechanical and automotive engineers, so you can be assured of the outstanding quality and workmanship of these re-manufactured throttle bodies. The photo does NOT do these throttle bodies justice!

Through different testing procedures, gains of around 10hp at the rear wheels have been recorded if used in conjunction with extractors/exhaust and cold air intake. A greater power gain can be achieved with additional mods such as a larger cam and supercharger etc.

On top of this power increase, it will also make your engine sound meaner (i.e. more air rushing into the engine) and offer a much better throttle response.

Please note that we don't manufacture these throttle bodies in 70mm as we feel that they are unsafe in long term since the wall thickness is too thin and may fail over time.

These throttle bodies have been fitted to a number of cars including David Wilzig's ITT.38L, which was the FASTEST V6 IN AUSTRALIA, pulling 9.981 seconds @ 137.88mph down the quarter and making 750hp! So these products have been well proven to work even on the most extreme cars.

As you can see on the before and after dyno graphs, a VY Commodore with manual transmission, extractors/exhaust and chip have made 161.2hp at the rear wheels. After changing leads, spark plugs and installing our larger throttle body power jumped to 176.9hp at the rear wheels.

Power Run - Standard Throttle Body

Power Run - Larger Throttle Body

Please note that our throttle bodies use a brand new 69mm brass butterfly to match the bored out throat. Other products on the market are merely a cleaned up version of the factory item and still use the original butterfly which leaves the main restriction to airflow in place. This is done to mislead people into thinking that they are selling a larger throttle body when they actually are not! To be sure, it is best to ask for photographic proof that the butterfly diameter is what they claim it to be.

Measured Throttle Body

Vehicle Fitment Guide

Notes:

• These throttle bodies are not polished.
• Vehicles equipped with automatic transmissions will require a tune as the shift points are altered by fitting this throttle body. We can provide a re-calibrated PCM or memcal to suit.
• For customers with either Caprice/Statesman WH or Monaro V2.II models later than 09/02, we recommend to check the throttle body to determine if they have VX or VY type. If you are unsure, please send us a picture of the IAC mounting boss on top of the throttle body to determine it for you.
• Mace bored out throttle body to suit Holden VS-VX 3.8L V6 can be purchased through another listing.

This set of forged pistons and rings has been specifically designed to achieve a strong and reliable motor. Being manufactured from 2618 alloy with 52 series pins makes these pistons far superior than the common 4032 alloy ones. This set has been ideally built to provide max durability, strength and scuff resistance.

Specifications:

• Compression: 8.5:1
• Ceramic coated for better heat rejection.

Contents:

• 01 X JE forged piston set
• 01 X Hastings piston ring set
• 06 X Wrist pin
• 12 X Snap ring

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: For an Ecotec V6 engine, L67 connecting rods will be required which can be purchased through another listing.

This set of 3 high voltage ignition coils is designed to meet and exceed OEM specifications when it comes to performance and durability. With 6.4k OHM winding resistance, brass coated leads and high efficiency winding, these coils will further result in enhanced throttle response, smooth idle and quicker cold starts. These coils will allow the motor to rev easier which means more performance.

These coils comes with a 3 year/100,000km product replacement warranty.

Contents:

• 3 X Ignition Coil

Vehicle Fitment Guide

Note: A single ignition coil can be purchased through another listing.

This performance 82°C thermostat suits Holden Buick LN3 L27, Ecotec L36 and L67 Supercharged 3.8L V6 engines.

Key Benefits:

• Drops engine temperature by 10°C.
• Prevents overheating and improves performance.
• DIY installation.
• Super-affordable performance modification.
• Up to 30% higher coolant flow in comparison to standard replacement items, due to larger cross sectional area and more stream lined features. 

Why

Heat is the single biggest killer of performance and can actually damage your engine if its exposed to extreme temperatures for a extended time frames. Avoiding heat in its various forms will not only help boost your engine's performance but also ensure that power levels are consistent and reliable.

A cheap way to reduce coolant temperatures in these engines is by installing one of our 82°C thermostats.

What

Factory-supplied thermostats begin to open at 92°C. This is far too high for a performance application. At this temperature, your engine could begin to suffer from pre-ignition (detonation) or at the very least the ECU will retard the ignition timing to prevent detonation, robbing you of precious horsepower.

How

Our 82°C thermostat opens much earlier than the factory item, allowing coolant to flow through the engine from the radiator much sooner. This limits the peak engine temperature by 10°C, preventing overheating.

With your engine running consistently cooler, your horsepower levels across the rev range will be more consistent and reliable which is especially good for boosted applications or even when towing on hot summer days.

Contents:

• 1 X 82°C Cooler thermostat

Vehicle Fitment Guide

Note: For an L67 engine, installation will require the removal of the supercharger.

This Mace exhaust manifold gasket set prevents exhaust leaks and blow-outs which can cause burnt exhaust valves and is excellent for use in turbo/boost applications. It contains three layers of steel fullfiling the requirments of OE.

This gasket suits Holden vehicles fitted with Ecotec L36 and L67 supercharged V6 engines.

Specifications:

• Thickness: 1.65 mm

Contents:

• 2 X Exhaust manifold gasket

Vehicle Fitment Guide

This valve regrind gasket set (VRS) is designed to meet and exceed OEM specifications. It has been evaluated right here in Australia so you can be assured of perfect fitment and durability for your Holden LS1 5.7L V8 and any other vehicle equipped with the same motor.

Contents:

• 01 X Throttle body seal
• 02 X Cylinder head gasket
• 02 X Exhaust manifold gasket
• 02 X Knock sensor seal
• 02 X Valve cover seal
• 04 X Water channel gasket
• 08 X Valve cover grommet
• 08 X Intake manifold seal
• 16 X Valve stem seal
• All other required gaskets and seals

Vehicle Fitment Guide

Note: The image is for illustrative purposes only.

This Mace exhaust manifold gasket set, for the popular GM LS engines, features OE quality multi-layer steel (MLS) construction to ensure a positive seal under extreme temperatures. These gaskets are designed to meet and exceed OEM specifications so you can be assured of quality and durability.

Three layers of stainless steel are utlilized in manufacturing of these gaskets and each layer has an embossment at critical sealing areas for maximum sealing. The spring steel layers provide tension when compressed, keeping the joint tight and preventing the seal from being blown out.

Contents:

• 2 X MLS exhaust manifold gasket 

Vehicle Fitment Guide

This Platinum premium MLS (Multi-layer steel) valve regrind gasket set (VRS) is designed to meet and exceed OEM specifications. It has been evaluated right here in Australia so you can be assured of perfect fitment and durability for your Holden LS1 5.7L V8 and any other vehicle equipped with the same motor.

Contents:

• 01 X Throttle body seal 
• 02 X MLS cylinder head gasket 
• 02 X Exhaust manifold gasket 
• 02 X Knock sensor seal 
• 02 X Valve cover seal
• 04 X Water channel gasket 
• 08 X Valve cover grommet 
• 08 X Intake manifold seal 
• 16 X Valve stem seal
• All other required gaskets and seals

Vehicle Fitment Guide

Note: The image is for illustrative purpose only.

This OTR cold air intake ulitises an OEM style plastic construction which makes it exceptionally durable while giving a factory style look to your engine bay. In conjunction to the larger filter area where airflow is dramatically increased from standard, there are also port bosses designed into both sides, allowing breather and/or catch cans setups to be easily plumbed into the OTR.

Installation of this OTR air intake is extremely easy with the adjustable mounting brackets and even clears Monaro's fluted bonnets!!

With MAF or MAF-Less configurations available, the new plastic VCM OTR covers all options.

Contents: 

• 1 X Plastic VCM OTR assembly
• 1 X Fitting kit

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 image is for illustrative purposes only.
• Vehicles with aftermarket radiators may experience installation difficulty. We will not be held responsible if your vehicle has an aftermarket radiator and fitment is unsatisfactory. Please check prior to purchase.
• A hole needs to be drilled in the OTR for the rubber grommet.
• Some modifications to the cooling/air-con system may be required on your VT-VX.
• MAF-Less configurations on some vehicles may require an additional IAT sensor and appropriate harness. These components have to be purchased separately.
• Please read the terms & conditions before making a purchase.
• For VZ MAF-Less OTRs, MAF-Less conversion kit (IAT sensor and harness) is mandatory and can be purchased through another listing.
• The MAFLess OTR requires a suitable tune. Depending on the current mods of the vehicle, we can supply a custom mail order tune separately, otherwise a dyno tune would be required.

Crow Cams valve springs are made from aircraft quality alloy steels to give the best performance and reliability at a reasonable price.

These single beehive valve springs are specially designed to suit our high lift, high acceleration profile.

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:

• Making correct measurements before assembly is critical as many variables are present.
• The image is for illustrative purposes only.