Advance Headers | Mild Steel Exhaust Extractors | Holden Commodore VTII-VZ Statesman WH-WL LS1 LS2 5.7L 6.0L | A317

PRODUCT CONTENTS:

• 1 x Heavy-Duty Mild Steel Performance Exhaust Extractor Header Set (Left & Right Bank Assembly)

Key Features:

• Tuned mandrel-bent primary piping paths map perfectly to GM LS-Series oval exhaust ports, ensuring uniform velocity profiles and maximum cylinder evacuation efficiency
• Substantially optimizes mid-to-high range horsepower and delivers notable low-end torque gains—ideal for highway cruising, rapid acceleration, towing, and street/strip performance
• Heavy-duty mild steel construction structurally built to withstand intense thermal expansion cycles and the extreme radiant heat typical of high-displacement engine bays safely
• Thick, precision laser-cut cylinder head flanges maintain an ultra-stable mating boundary to permanently guard against warping and high-pressure gas leaks
• Engineered as a direct bolt-on solution designed to route cleanly past modern K-frames, rack-and-pinion steering setups, and transmission crossmembers cleanly

Specifications:

⚠️ Crucial Generation-Specific Compliance & Fitting Warnings:
1. VY Series II Onward Cat Converter Mandate: For all models from VY Series II onward (including VZ series), the factory exhaust layout requires these headers to be fitted alongside new aftermarket high-flow catalytic converters to remain physically compatible and emissions-compliant. They will not bolt directly to original factory pre-VYII catalytic pipes.
2. 6.0L Oxygen Sensor Wire Extension: When retrofitting this kit onto 6.0-Litre LS2 engine variations, the relocation of the exhaust gas collectors dictates that O2 sensor wiring extensions (Part No. OSER) are mandatory to safely bridge the factory harness back down to the new oxygen sensor placement loops.
3. Engine Restriction Note: Mapped exclusively for aluminum GM Gen III/IV block footprints. It will not align with early VT Series I iron-block Holden 5.0L motors.

Please Note: Professional installation by an exhaust specialist or qualified automotive mechanic is highly recommended to guarantee proper emissions linkups, sensor routing, and a perfect leak-free seal.