Kooks Headers 2181HY30B 1-7/8in. x 2in. Stepped Tri-Y Headers with 5in. Ultra GREEN Catted Connection Pipes and Heat Blankets

The Kooks Headers 2181HY30B is a complete high-performance exhaust header kit featuring 1-7/8" x 2" stepped Tri-Y long tube headers, 5" Ultra GREEN catted connection pipes, and thermal heat blankets — engineered specifically for the 2022+ Chevrolet Corvette C8 Z06 with the LT6 flat-plane crank V8.

The stepped Tri-Y design uses 1-7/8" primary tubes that increase to 2" before the collector, optimizing exhaust pulse timing and improving mid-range torque compared to a traditional four-into-one layout. Headers are constructed from T304 aircraft-grade stainless steel with oval ports, a stock bolt pattern, and 3/8" thick laser-cut flanges that resist warping. The 3" flanged collector outlet connects directly to the included Ultra GREEN catted connection pipes or the factory catalytic converters, making the system fully modular.

Key Features:

• 1-7/8" to 2" stepped primary tubes in a Tri-Y configuration
• T304 aircraft-quality stainless steel construction throughout
• Oval port, stock bolt pattern flanges for direct OEM fitment
• 3/8" thick laser-cut stainless steel header flanges
• 5" body Ultra GREEN high-flow metallic catted connection pipes included
• High-flow metallic catalytic substrate sized for the high-output LT6 engine
• Military-grade thermal heat blankets included — rated to handle up to 2,200°F / 1,200°C
• Heat blankets designed to improve underbody heat management and catalytic converter longevity
• Flanged connection pipe outlet connects directly to OEM cat-back exhaust
• Provisions for factory oxygen sensors maintained
• Dyno and race tested for maximum power gains
• Handcrafted in the USA
• Backed by a limited lifetime warranty to the original purchaser

Note: Tuning is required for proper air/fuel ratio calibration with this system. This product is not CARB compliant and cannot be sold, installed, or used on licensed vehicles in the state of California.