MRC Pacemaker Extractors PH9377 Holden Commodore Bolt on VE-VF 6.0L L98 L77 L76

$668.11
RRP $742.35
SAVE $74.24 (10%)
In Stock


Calculate Shipping



Free Shipping - $0.00
Free Shipping Australia Wide. Courier used will depend on products and location. No PO Boxes.

Gasket:                DSF 138 not included

 

Air Con:             Yes 

           

Primary Pipe:      1 3/4" (44mm)

 

Oxy Sen:      Yes        

   

Secondary Pipe:  2" (51mm)

 

E.G.R:          N/A   

         

Outlet:      2 1/2" (63mm)

 

Y Branch:  N/A

  

Fitting time:         2 1/2 Hrs

 

 

Note: These headers fit up to the Cats in original factory position but require a new flange to be welded onto the cats

 

 

Features:

 

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. 

What is scavenging? Scavenging is one of the most critical parts to a design of a header. The tubes volume (diameter and length) is chosen to represent a discharge of spent fuel or pulse being discharged from the engine at a given rev range (usually mid to top end), without competing with the next charge. This pulse then enters the collector cone with a greater volume than the surrounding connected pipe(s). This creates a low pressure (or vacuum) at the exit of the next pipe. This vacuum then in turn sucks at the next pulse travelling through the next pipe in the sequence, vacuuming or scavenging the cylinder bore clean. This aids towards an unpolluted cylinder bore, ready for the next clean dose of air fuel mixture.


If you’re looking for performance enhancement it’s time to get your quality Pacemaker extractors for the best price from MRC Performance! 

FITTING INSTRUCTIONS

 

• Place an anti zapper across battery terminals 

 

• Remove engine cover 
• Remove spark plug leads 
• Undo dipstick and place to one side Note: It is not necessary to remove completely 
• Unplug O2 sensor 
• Remove standard manifold and cat converter  
• Note: It is necessary to undo steering shaft from rack, replace when finished
• Unscrew the O2 sensor and place to one side 
• Place gasket onto head using the front and rear bolt 
• Place headers into engine bay from underneath and tighten 
• Place cut cat converter back into the same factory position behind new header 
• Tack weld cat converter to flange behind the header 
• Unbolt cat from header and finish off welding 
• Place cat converters with gaskets back into engine bay from underneath and tighten 
• Replace O2 sensor into header to finish 
 

(PH9377)

SKU PH9377
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


More From This Category