Kooks Headers 2241H420 1-7/8in. Long Tube Header and Catted Connection Kit LS1 5.7L

The Kooks 2241H420 is a complete 1-7/8-inch long tube header and catted connection kit engineered for the 4th-generation F-body platform. This kit replaces restrictive factory exhaust manifolds with premium stainless steel long tube headers and a high-flow catted Y-pipe, delivering measurable gains in horsepower and torque while retaining catalytic converters for emissions compliance.

Kit Includes:

• 1-7/8" x 3" T304 stainless steel long tube headers with merged collectors for optimized exhaust scavenging
• 3" x 2-3/4" catted stainless steel Y-pipe connecting directly to the OEM mid-section connection point
• 3/8" laser-cut flanges with full TIG welds for precision fit and leak-free performance
• Mandrel-bent primary tubes for maximum, unrestricted exhaust flow

Key Features:

• Constructed from T304 aircraft-quality stainless steel for superior heat resistance and long-term durability
• Dyno and race tested for proven power gains across the RPM range
• Bolts directly to OEM exhaust mid-section — no cutting or fabrication required
• Delivers an aggressive V8 exhaust note under wide-open throttle while remaining refined at cruise
• Handcrafted in the USA by Kooks Headers and Exhaust, a family-owned company with over 50 years of motorsport heritage
• Not CARB approved; EPA compliant for 49-state use

Warranty: Backed by Kooks' limited lifetime warranty on stainless steel construction and 25,000 miles on catalytic converters to the original purchaser. Warranty does not cover coatings, header wraps, improper installation, or modifications.

California Residents: This product is not approved for use on emissions-controlled vehicles in California. Purchasers are responsible for compliance with all applicable California and state emissions laws.