Kooks Headers 1131H030 1-5/8in. Long Tube Header and GREEN (X) Connection Kit

The Kooks Headers 1131H030 is a complete long tube header and GREEN catted X-pipe kit engineered to unlock maximum exhaust flow and performance. This kit pairs 1-5/8" x 2-1/2" stainless steel long tube headers with a 2-1/2" x 2-1/2" OEM-connect GREEN catted stainless steel X-pipe, delivering a complete bolt-on exhaust solution from the cylinder head to the factory cat-back connection point.

The included Kooks GREEN catalytic converters are EPA-verified high-flow cats rated for naturally aspirated and forced induction applications. They feature a high-density substrate and an advanced precious-metal coating designed to handle the elevated exhaust temperatures produced by modified and boosted engines.

Kit Includes:

• 1-5/8" x 2-1/2" stainless steel long tube headers
• 2-1/2" x 2-1/2" OEM-connect GREEN catted stainless steel X-pipe
• O2 sensor extensions
• Gaskets and all installation hardware

Header Construction Features:

• 16-gauge T304 aircraft-quality stainless steel construction
• 3/8" thick laser-cut flanges for precision fitment and leak-free sealing
• 1-5/8" mandrel-bent primary tubes for unrestricted exhaust flow
• Stock bolt pattern for straightforward installation
• OEM connection point for direct bolt-on to factory cat-back exhaust

GREEN Cat Features:

• EPA-verified high-flow catalytic converters
• Rated for use on naturally aspirated and forced induction applications
• High-flow substrate designed for maximum exhaust efficiency
• Advanced precious-metal catalyst coating for durability under high heat

Kooks Headers has been a leader in high-performance exhaust manufacturing since 1962. Every product is handcrafted in the USA, dyno and race tested for maximum power, and backed by a limited lifetime warranty to the original purchaser. A professional tune is recommended to maximize the performance gains from this long tube header upgrade.

Note: Long tube headers require removal of the OEM catalytic converters. Not legal for sale or use in California. Check local and state regulations before purchasing.