XForce | LS1 V8 Headers & High-Flow Cat Kit | Holden Commodore VT-VZ 1999–2007 | H2-HV12B-KIT

XForce | LS1 V8 Headers & High-Flow Cat Kit | Holden Commodore VT-VZ 1999–2007 | H2-HV12B-KITXForce LS1 V8 Header & Metallic Cat Kit Holden VT VZ H2 HV12B KIT Upgrade your LS1 V8 performance with the Xforce Header and Cat Kit. Crafted from durable 201 grade stainless steel, this kit is specifically engineered to optimize exhaust scavenging and flow for the 5. 7L Gen III engine. It features a high performance 4 into 1 design with 1 5 8" primary pipes collecting into a 2. 5" outlet. The kit includes 2. 5" metallic high flow 100 cell catalytic

XForce LS1 V8 Header & Metallic Cat Kit - Holden VT-VZ - H2-HV12B-KIT

Upgrade your LS1 V8 performance with the Xforce Header and Cat Kit. Crafted from durable 201-grade stainless steel, this kit is specifically engineered to optimize exhaust scavenging and flow for the 5.7L Gen III engine. It features a high-performance 4-into-1 design with 1 5/8" primary pipes collecting into a 2.5" outlet.

The kit includes 2.5" metallic high-flow 100-cell catalytic converters, providing a significant reduction in backpressure compared to factory units. This combination delivers improved torque, increased horsepower, and the deep, aggressive V8 growl that Xforce is famous for. Designed as a modular upgrade, this kit is intended to bolt directly to Xforce cat-back exhaust systems for a complete performance solution.

What's in the Box?

• 1x Pair of 4-into-1 Headers (1 5/8" Primaries)
• 2x 2.5" Metallic High-Flow 100-Cell Catalytic Converters
• Gasket and Bolt Kit for Header-to-Cat connection

Features:

• 4-into-1 Design: 1 5/8" primary pipes for balanced flow and improved mid-range torque.
• High-Flow Metallic Cats: 100-cell substrate for maximum exhaust velocity while maintaining performance.
• 201 Grade Stainless Steel: Non-polished finish for heavy-duty durability.
• RWD Compatibility: Specifically suits VT-VZ LS1 RWD sedan, ute, and wagon variants.
• Performance Ready: Designed to integrate seamlessly with Xforce cat-back systems.

Important Installation Notes:

• O2 Extensions: O2 sensor extension looms are required for installation (sold separately).
• Dyno Usage: Tuning pipes must be used in place of catalytic converters when running the vehicle on a Dyno to prevent substrate damage.

Specifications:

• Make: Holden
• Model: Commodore, Statesman, Caprice
• Series: VT, VX, VU, VY, WL
• Engine: 5.7L LS1 V8
• Primary Pipe Size: 1 5/8"
• Collector/Cat Size: 2.5"
• Material: 201 Stainless Steel

Important Information

• The image shown may not reflect the actual product
• Shipping times may vary depending on destination and stock availability

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