1″5/8 primary size 4 into 1 header with High-Flow Catalytic Converters, 304 Stainless Steel (for track and off road use only) - H2-HV12B-KIT

Upgrade your LS1 V8 with the Xforce Header and Cat Kit. Crafted from durable 201 grade stainless steel, it features 1 5/8″ primary pipes collecting to 3″ for optimal exhaust flow. The kit includes metallic high flow cats also in 2.5″ for enhanced performance. Experience improved torque and a deep, aggressive sound. Take your LS1 V8 to the next level with Xforce. Designed to bolt to Xforce cats back system.

• 4-1 design 1 5/8″ primary pipe with 2.5″ outlet
• 2.5″ metallic high flow 100 cell cats
• Non polished stainless steel
• O2 extension looms are required
• Must use tuning pipes in place of cats on Dyno
• Suits VT-VZ LS1 RWD vehicles
• Image for reference only

Please note: This product is equipped with a 200 cspi sports catalytic converter designed for track and off road use only. It may not pass emission tests and it is not EC certified. Ensure local regulations allow for its usage.
This kit is also available with a 400cspi catalytic converter replacement which offers improved emissions control however it is not EC certified. Ensure local regulations allow for its usage. It can be found in the related items section.