Holden LS1 1 5/8" Primary Tri-Y Header & High-Flow Cat Kit - HS-HV09B-KIT

Unlock the performance of your LS1-powered Holden with the Xforce Tri-Y Header Kit. This comprehensive exhaust upgrade is designed to improve low-to-mid-range torque and overall horsepower by optimizing exhaust scavenging. Crafted from polished stainless steel, this kit provides a premium look and long-lasting durability for your V8 Commodore or Calais. Note: O2 extension looms are required for installation; tuning pipes must be used in place of catalytic converters when running the vehicle on a Dyno.

What's in the Box?

• 1x Set of 1 5/8" Tri-Y Headers (Left & Right)
• 2x 2.5" 100-Cell Metallic High-Flow Catalytic Converters
• All Necessary Gaskets and Bolts for Header-to-Cat Connection

Features:

This product offers the following high-performance features:

• Tri-Y Design: The 4-2-1 Tri-Y configuration is specifically engineered to enhance torque spread, making it an ideal choice for street-driven LS1 vehicles.
• 1 5/8" Primaries to 2.5" Outlets: Carefully sized primary pipes ensure optimal exhaust gas velocity, leading to improved throttle response and power gains.
• 100-Cell Metallic Cats: Includes high-flow metallic substrate catalytic converters that offer significantly less restriction than factory ceramic units while remaining durable under performance conditions.
• Polished Stainless Steel: Fully constructed from high-quality stainless steel with a polished finish for superior corrosion resistance and a show-quality engine bay appearance.

Specifications:

Important Information

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