Advance Headers | Mild Steel Exhaust Extractors | Holden Commodore VE Statesman WM 3.6L Alloytec SIDI | A231

PRODUCT CONTENTS:

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

Key Features:

• Direct-fit layout tracks perfectly up to the factory catalytic converters remaining in their original locations for a hassle-free downstream hookup
• Tuned mandrel-bent primary piping pathways ensure completely uniform gas flow routing, eliminating the heavy restrictions found in original cast manifolds
• Substantially optimizes overall exhaust gas scavenging velocity, delivering crisper throttle response and noticeable low-to-mid range torque gains for the DOHC architecture
• Heavy-duty mild steel construction structurally built to handle severe thermal expansions and demanding street-performance heat cycles safely
• Thick, precision laser-cut cylinder head flanges maintain flush mating boundaries to guard permanently against warping and exhaust gas leaks

Specifications:

⚠️ Crucial Engine & Oxygen Sensor Compatibility Warnings:
1. Cylinder Head Port Exclusion: This extractor set is designed exclusively for early-to-mid era 3.6L heads featuring the traditional 3-port exhaust face footprint. It will NOT fit later SIDI engines utilizing 4-bolt single-pipe integrated manifolds (where the manifold is cast inside the head and exits via one round port). Please verify your exhaust port layout before ordering.
2. SIDI Wiring Requirements: If fitting this kit onto compatible Spark Ignition Direct Injection (SIDI) motor variants, the altered plumbing paths mean you will require two (2) Oxygen Sensor Wiring Extensions (Part No. OSE6) to safely reconnect your factory loom monitoring lines cleanly without stretching.

Please Note: Professional installation by an exhaust specialist or qualified automotive mechanic is highly recommended to guarantee proper system alignment and a perfect gas-tight seal.