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

Vehicle Applications:

 

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