PH 5275 HQ-WB 304-355 (5.0) E.F.I. Head 1 3/4" Competition Header Tri-Y

Part specs

SKU

PH5275_L_R

Supplier

Pacemaker

Category

Extractors and headers

RRP

$1252.66 AUD

Brand

Pacemaker_ADL

Vehicle fitment

Holden HJ HQ HX

Stock status

UNKNOWN

Source ID

PACEMAKER_PH5275_L_R

Workshop note

PH 5275 HQ•WB 304•355 (5.0) E.F.I. Head 1 3/4" Competition Header Tri•Y (SKU: PH5275_L_R) — Pacemaker Australia Product Overview Serious about performance? The PH 5275 HQ•WB 304•355 (5.0) E.F.I. Head 1 3/4" Competition Header Tri•Y delivers the flow, tone, and build quality your Holden HJ HQ HX deserves, backed by Pacemaker's reputation for excellence. Manufactured by Pacemaker_ADL and available through Pacemaker, the PH 5275 HQ•WB 304•355 (5.0) E.F.I. Head 1 3/4" Competition Header Tri•Y represents the gold standard in aftermarket exhaust technology. Every component — from the CNC•machined flanges to the internally baffled mufflers — is engineered to reduce backpressure, improve exhaust gas velocity, and deliver a measurable increase in both power and torque. Key Features & Benefits • High•flow catalytic converters (where applicable) meet emissions standards without choking flow • Backed by Pacemaker's Australian warranty and nationwide support network • Mandrel•bent 304•grade stainless steel tubing for optimal exhaust flow and zero restriction points Vehicle Fitment & Installation Designed as a direct replacement for the Holden HJ HQ HX, the PH 5275 HQ•WB 304•355 (5.0) E.F.I. Head 1 3/4" Competition Header Tri•Y uses all OEM mounting locations and includes every bracket, gasket, and clamp needed for a straightforward installation. Professional installation is recommended but experienced home mechanics can complete the job in 2•4 hours on a hoist. Performance Benefits The performance gains from the PH 5275 HQ•WB 304•355 (5.0) E.F.I. Head 1 3/4" Competition Header Tri•Y aren't just numbers on a dyno sheet — you'll feel the difference every time you accelerate. Reduced backpressure means your engine breathes easier, spools turbos faster, and delivers throttle response that puts a smile on your face. Combined with the weight savings over factory steel exhausts, this upgrade transforms how your Holden HJ HQ HX drives. Compatible Vehicles This part is designed for fitment on: Holden HJ HQ HX. Supplier Information The PH 5275 HQ•WB 304•355 (5.0) E.F.I. Head 1 3/4" Competition Header Tri•Y is sourced from Pacemaker (pacemaker.com.au), one of Australia's leading automotive parts distributors. Every unit is backed by Pacemaker's warranty and supported by their nationwide dealer network. SKU: PH5275_L_R | RRP: $1252.66 AUD | Available from Pacemaker. Where to Buy Available now from Pacemaker at an RRP of $1252.66. Order today with confidence — every system is inspected, packed, and shipped from Australian warehouses with full tracking and warranty support.