MRC Pacemaker Extractors PH5050 Holden Commodore VT & WH Statesman 5.0L 304 V8

In Stock

Calculate Shipping

Free Shipping Australia Wide. Courier used will depend on products and location. Sorry no PO Boxes.
Carbon offset freight - $2.00
100% carbon neutral freight to your door. Sendle couriers will be used to send your parcel which may take an extra 1-2 days. Sorry no PO Boxes.

Pacemaker PH5050 - Commodore VT & Statesman WH 5.0L EFI V8. Manual & Automatic. TRI-Y Design.


Part #:    PH 5050          

P/Steering:    Yes    

Gasket:    DSF 63

Air Con:    Yes    

Primary Pipe:    1⅝" (41mm)

Oxy Sen:    N/A    

Secondary Pipe:    1⅞" (48mm)

E.G.R:    N/A    

Outlet:    2½" (63mm)

Y Branch:    N/A    

Fitting Time:    2½ Hrs



Pipe over cone design

All pipes are mandrel bent

All flanges are precision laser cut

Painted in the distinctive PACEMAKER heatproof blue


For over a quarter of a century, Pacemaker has been innovating, designing and manufacturing some of the highest quality exhaust headers in Australia.

Pacemaker headers have Precision Laser cut and machined thick flanges to eliminate leaking and warpage and are jig welded for guaranteed fitment. 

Pacemaker uses turbulence eliminating 'Pipe Over Cone™' technology which not only dramatically improves flow through the exhaust but, combined with shot peen blasting, also helps to lengthen the life of the product. 

Pacemaker headers are finished in a bright and attractive, specially developed blue heatproof (to 1270 degrees) coating and come with a 2-year road use warranty (excluding LPG vehicles). 

How much increase in power will I get? In most cases around 10% is quite achievable. This may mean if you have, for example, a 4WD vehicle delivering around 70 kilowatts at the wheels you could expect possibly 6 to 10 kilowatts increase. If you have a V8 5.7 Litre commodore with around 160 kilowatts at the rear wheels you could expect to reach 170 to 180 kilowatts. This is just a generalization and other factors do become involved. Cold air intake and open exhaust systems encourage the full effect of a well-designed set of headers.

What is the difference between a TRI-Y and a 4-into-1 design? A 4-into-1 design is perhaps the most traditional design. This design is common to the US market and is well used within the drag race fraternity. The basic principle behind the design is that the scavenging effect within the collector cone effects the three remaining pipes (in a V8 half), instead of limiting the pulse to the very next pipe in the sequence. This generally results in a header that performs very well in the mid-range to top end of the engines performance.

A TRI-Y on the other hand splits the firing order evenly and uses the secondary pipes as sequential collectors. This results in generally a greater scavenging effect due to the fact that scavenging is achieved at 2 different points in the header design, firstly at the primary to the secondary collector and secondly to the secondary outlet collector. Generally, this improves torque in the lower to mid-range performance of the engine.

Both designs are usually more efficient than a standard manifold and both offer distinctly different advantages. 


Note: These headers have been specially designed for easy fitment and there is no need to unbolt and or remove chassis to floor braces found on all VT models

Place steering on lock pointing nut to the rear for easy access.

Place anti zapper on battery.

Unclip oxygen sensors, disconnect engine pipes and unbolt from flanges after cat converters.

Remove manifolds

Unplug leads and remove spark plugs.

Remove manifolds.

Right Hand Side (drivers)

Bend heat shield located on top of engine mount down.

Unbolt steering bolt and clip.

Place steering knuckle on top of chassis rail.

Note: if fitting to a manual, it is necessary to unbolt clutch line transfer unit located on the chassis to floor brace and push up and

out of the way.

Locate the two self-tapping screws that tie down the power steering brackets at the front of the motor and remove.

Unbolt rack, pull down and wind to the center of the car.

Place sealant onto gasket and then place gasket onto head using 2 original bolts to hold into position.

From the top carefully slot header down into position and replace remaining bolts to tight.

Return steering rack to the original position and bolt up.

Replace knuckle and clip and replace nut and bolt.

Refasten power steering lines.

Left Hand Side (passenger)

Place sealant onto gasket and then place gasket onto head using 2 original bolts to hold into position.

Slot header into engine bay through the top and hang onto bolts.

Replace remaining bolts and tighten up.

These headers are designed to be used with the existing system.

Take engine pipes and cut.

Remove any remaining off-cut that may be left inside.

Return to the underneath of car and place into position.

Weld to supplied flanges. 



SKU PH5050
Brand Pacemaker

Be The First To Review This Product!

Help other MRC Performance users shop smarter by writing reviews for products you have purchased.

Write a product review

Others Also Bought

More From This Category