Pacemaker PH5250 Headers – Holden Torana LH & LX 253 / 308 V8

Pacemaker PH5250 headers are engineered for Holden Torana LH and LX vehicles fitted with 253 or 308 Holden V8 engines. These tuned-length, competition-spec headers deliver superior exhaust flow and power throughout the rev range, while maintaining a strong, clean fit against the block and steering components. Designed for both manual and auto setups, including Turbo 350 / 400 transmissions and hydraulic clutch conversions.

Key Specifications

• Part Number: PH5250
• Design: Competition, tuned-length interference design
• Primary Pipes: 1.75"
• Secondary Pipes: 1.78"
• Outlet: 3.00" four-bolt flanged outlets
• Material: Mandrel-bent steel with precision TIG welding
• Finish: Pacemaker Blue heat-resistant coating (800°C rated)

Performance Insight

At 4000 rpm, a 308ci Holden V8 engine draws approximately 10,000 L/min of intake air and expels around 30,000 L/min of exhaust gas. The tuned pipe lengths and smooth collector transitions in PH5250 headers are designed to optimise this flow, improving exhaust pulse scavenging, torque, and throttle response across the rev range.

Fitment Notes

• Fits Holden Torana LH & LX – 253 & 308 V8 engines
• Will fit Turbo 350 / Turbo 400 automatic gearboxes
• Compatible with manual gearbox using hydraulic clutch conversion

Installation Tips

Wrap headers in cling wrap before installation to prevent scratching the finish or engine bay surfaces. Once in place, trim around the flange, start bolts, and remove the remaining wrap before tightening. Always lubricate fasteners with WD-40 or similar for easier removal and installation.

Recommended With

• Gaskets – see DSF009A
• Ceramic Coating – see PHC10 
• High-flow exhaust system components (sold separately)

Customer Support

For product advice, orders, or fitment help:

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87A Planthurst Road, Carlton NSW 2218, Australia
Exhaust Systems Since 1983