Holden HQ-WB (1971-1985) HJ-HQ-HX-HZ-WB- HQ-WB 304-355 (5.0) E.F.I. Head 1 3/4" Competition Header Tri-Y

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Holden HQ-WB (1971-1985) HJ-HQ-HX-HZ-WB- HQ-WB 304-355 (5.0) E.F.I. Head 1 3/4" Competition Header Tri-Y

For over 50 years, PACEMAKER has been renowned for its innovative exhaust headers crafted in Australia. The brand was the first to introduce mandrel-bending technology to the header market, revolutionizing the industry.

PACEMAKER continues to push the bar, utilizing advanced technology to develop one of Australia's largest Tri-y and 4-into-1 catalogs. In 1997, PACEMAKER launched its Pipe Over Coneâ„¢ technology (copyrighted design number 135712) to reduce turbulence and extend the product's life.

 

 

Pacemaker stocks quality headers featuring their "Mandrel Bend" System.

Their cutting edge facility equips a computer-controlled Bender with a patented vertebrate-type mandrel, creating round bends previously inaccessible in Australia.

Moreover, Pacemaker's headers come with precision laser-cut, machined flanges, jig-welded joints, hi-tensile bolts, big bore pipes, and emission hook-ups.

For added protection, these headers are finished with a heat-proof finish tested up to 1270°, and feature Pipe Over Cone™ technology (copyright number 135712).

This special technology increases exhaust gas flow, reducing turbulence within the header and resulting in improved power and performance.

 

This product is designed to fit Holden HQ-WB Series: HJ-HQ-HX-HZ-WB-.
Notes: HQ-WB 304-355 (5.0) E.F.I. Head 1 3/4" Competition Header Tri-Y

• Will fit with High Energy Sump

• Will fit with HQ type Mechanical Clutch

• Suitable for 5.7 Litre stroked or super charged motor

These Headers will fit the following gearboxes:

• Australian four speed with cable clutch

• Commodore VN-VS five speed

• Toyota Supra five speed with Hatfield bellhousing

• Holden Trimatic

• Holden Turbo 400

• Holden Turbo 350

• Will fit with High Energy Sump HE2101 Part No.

• Commodore four speed automatic Turbo 700 with

Hatfield rear cross member using Turbo 700 gear box

mounts and 308 engine mounts

Product Specs

Part #: PH 5275    
P/Steering: Yes Gasket: DSF 63
Air Con: Yes Primary Pipe: 1¾" (44mm)
Oxy Sen: Yes Secondary Pipe: 2" (51mm)
E.G.R: N/A Outlet: 3" (76mm)
Y Branch: N/A Fitting Time: 2 Hrs
Specifications

  • Direct bolt on fitment
  • Mandrel bends
  • All fitting hardware includes
  • Australian made
  • Warranty - 2 years on headers, 5 years on exhaust components.
Important Notes

Product Specs

Part #: PH 5275    
P/Steering: Yes Gasket: DSF 63
Air Con: Yes Primary Pipe: 1¾" (44mm)
Oxy Sen: Yes Secondary Pipe: 2" (51mm)
E.G.R: N/A Outlet: 3" (76mm)
Y Branch: N/A Fitting Time: 2 Hrs

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