Advance Headers | Mild Steel Engine Swap Extractors | Holden HQ-WB with 5.0L EFI V8 | A414
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Advance Headers | Mild Steel Engine Swap Extractors | Holden HQ-WB ...
Description
Description
Advance Headers High-Performance Mild Steel Engine Swap Extractors for Holden HQ to WB Fitted with 5.0L EFI V8 Conversions
The Advance Headers Conversion Exhaust Extractors (A414) are high-flow, heavy-duty tubular manifolds custom-engineered specifically for Holden HQ, HJ, HX, HZ, and WB vehicles undergoing a late-model 5.0-Litre Electronic Fuel Injection (EFI) V8 engine swap. Purpose-built to clear the structural boundaries of the classic chassis while accommodating the updated port architecture of the injected Holden V8 block (sourced from VN through VT Commodore donors), this swap header features substantial 1-¾" primary pipes stepping into 2" secondaries. By optimizing exhaust gas scavenging dynamics and removing backpressure restrictions, it maximizes horsepower gains, throttle response, and yields a menacing Aussie V8 roar.
PRODUCT CONTENTS:
- 1 x Heavy-Duty Mild Steel Left-Hand 5.0L EFI Conversion Extractor Bank Assembly
- 1 x Heavy-Duty Mild Steel Right-Hand 5.0L EFI Conversion Extractor Bank Assembly
Key Features:
- Engineered specifically to facilitate the installation of VN-VT Commodore 5.0L EFI V8 engines into older generation HQ, HJ, HX, HZ, and WB engine bays cleanly
- High-flow design featuring oversized 1-¾" primary runners transitioning into 2" secondary piping pathways to guarantee optimal top-end scavenging performance on modified or tuned street machines
- Tuned mandrel-bent pathways eliminate heavy casting bottlenecks to achieve completely smooth, uniform internal flow geometry
- Heavy-duty mild steel construction structurally built to handle intense engine bay thermal expansion cycles and high-vibration conversion setups safely
- Thick, precision laser-cut cylinder head flanges maintain a flat, ultra-stable mating footprint to permanently guard against warping, face distortion, and high-pressure exhaust leaks
Specifications:
- Brand: Advance Headers
- Part Number: A414
- Material: Mild Steel (Standard Finish)
- Engine Suitability: Holden 5.0L EFI V8 Conversion Blocks (VN, VP, VR, VS, VT Series Engine Castings)
- Primary Pipe Diameter: 1-¾" (44mm)
- Secondary Pipe Diameter: 2" (51mm)
- Component Type: Engine Swap Performance Exhaust Extractors / Headers
- Estimated Fitting Time: 1.5 Hours
- Welding Required: No (Direct Bolt-On Configuration to Cylinder Heads)
⚠️ Crucial Linkage Modification & Conversion Warnings:
1. Column-Shift Linkage Adjustments Required: This product (Part No. A414) maps tight against underbody structures to ensure clearance around steering columns and chassis mounts. If your conversion vehicle utilizes a Column-Shift transmission linkage system, these linkages will strictly require custom manual workshop modifications or repositioning to prevent physical contact with the primary pipes.
2. Cylinder Head Fitment Constraint: Specifically designed for the symmetry and port heights of factory injected Holden V8 heads (VN style). Will not correctly seal or line up against early carburetted Red/Blue/Black engine heads (HQ-WB native blocks).
Please Note: Due to the variances across engine swap engine mounts, starter motor positioning, and column gear adjustments, professional installation by an exhaust specialist or custom performance workshop is highly recommended.
Important Information
- The image shown may not reflect the actual product design.
- Ensure your vehicle details match the application guide below before purchasing.
Vehicle Applications for A414 Performance Holden EFI Engine Swaps
| Make | Model | Year Range Spec | Body Type | Chassis Series | Engine Conversion Details | Fitting Time | Drivetrain / Fitment Notes |
|---|---|---|---|---|---|---|---|
| Holden | Kingswood / Premier / Belmont / Monaro / Statesman / Ute | 1971 – 1985 (Chassis Range) | 4-Door Sedan / 2-Door Coupe / 5-Door Wagon / Utility / Panel Van / One-Tonner | HQ / HJ / HX / HZ / WB Series | 5.0L EFI V8 Conversion (VN to VT Commodore Engine Donor Swaps) | 1.5 Hours | RWD | Mandrel-bent upgrade conversion routing mapped past chassis rails and crossmembers. Fits floor-shift layouts cleanly. Shifter column linkages on automatic setups must be custom modified for runner clearance. |
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