Advance Headers | Mild Steel High Performance Tri-Y Extractors | Holden Commodore VE VF Statesman WM 6.0L 6.2L | A319HP

PRODUCT CONTENTS:

• 1 x Heavy-Duty Mild Steel High-Performance Left-Hand Tri-Y Header Assembly
• 1 x Heavy-Duty Mild Steel High-Performance Right-Hand Tri-Y Header Assembly

Key Features:

• Advanced High-Performance Tri-Y (4-2-1) configuration steps gas flow columns through specialized pairings to optimize exhaust scavenging velocity and torque punch
• Heavy-wall, mandrel-bent 1¾" primary pipelines transition smoothly into massive 2" secondary runners to eliminate backpressure restrictions entirely
• Substantially optimizes mid-range torque delivery and high-RPM power curves, maximizing the performance potential of naturally aspirated, cammed, or modified powerplants
• Heavy-duty mild steel construction structurally built to handle intense thermal expansion cycles and extreme under-hood operating heat cycles safely
• Thick, precision laser-cut cylinder head flanges maintain a flat, ultra-stable mating footprint to permanently guard against warping and high-pressure gas leaks

Specifications:

⚠️ Crucial Performance Modification & ECU Tuning Warnings:
Due to the oversized primary and secondary runner paths shifting the downstream outlet boundaries, the following fitment requirements must be adhered to:
1. Catalytic Converter Relocation Mandate: This product (Part No. A319HP) is a high-performance system that alters exit parameters. The factory or aftermarket catalytic converters MUST be physically cut and re-positioned downstream to align correctly with the modified exit geometry of these high-velocity collectors. (If you require a system that retains the factory cat position, please see alternative Part No. A319).
2. Engine Edit / ECU Tune Required: Because the relocated catalytic converters change exhaust flow characteristics and sensor positions, an Engine Edit (PCM/ECU re-tune) is mandatory post-installation to prevent Check Engine Lights (CEL), optimize the air-fuel ratio, and unlock the true horsepower gains generated by the headers.
3. Engine Limitation Note: Mapped exclusively for aluminum GM Gen IV block structures. Will not align with early VT Series I iron-block Holden 5.0L/304 engines.

Please Note: Due to the mandatory catalytic adjustments and required engine calibration, professional installation by an exhaust specialist and tuning by a qualified performance workshop is highly recommended.