Kooks 2861H420 1-7/8" Long-Tube Header & Catted Y-Pipe Kit for 2014-18 GM 1500

Vehicle Fitment

• 2014-2018 Chevrolet Silverado 1500 (6.2 L V8)
• 2014-2018 GMC Sierra 1500 (6.2 L V8)
• 2015-2020 Cadillac Escalade & Escalade ESV (6.2 L V8)
• 2018-2020 Chevrolet Tahoe (6.2 L V8)
• 2015-2020 GMC Yukon/Yukon XL (6.2 L V8)

Features

• 1.875" (1-7/8") primary tubing for enhanced exhaust flow and scavenging.
• Includes high-flow catted Y-pipe sized 3" x 3½" to match OEM connection.
• Constructed of premium 304-stainless steel for durability and corrosion resistance.
• Mandrel-bent long-tube headers designed for performance optimization.
• Direct-bolt design using factory mount locations - engineered for GM Gen-V 6.2L trucks/SUVs.
• Hand-crafted in the USA under Kooks quality standards.
• Optimized for street and track use when paired with supporting modifications.
• Important: Not CARB exempt - street legality in California and similar jurisdictions may be restricted.

Specifications

• Primary Tube Diameter: 1.875" (1-7/8")
• Y-Pipe Inlet Diameter: 3.00"; Y-Pipe Outlet to OEM: 3.50"
• Material: 304-stainless steel
• Engine Compatibility: 6.2 L V8 only
• Fitment Years: 2014-2018 for GM 1500 trucks; 2015-2020 for specified SUVs - coverage beyond 2020 unconfirmed.
• Application: Long-tube header kit with catted connection Y-pipe (not simply a header swap).
• Emissions Compliance: Not CARB exempt.

Included Components

• 1x Pair of long-tube headers (left & right banks)
• 1x Catted high-flow Y-pipe connection kit (3" → 3½" OEM output)
• Hardware kit including gaskets, bolts, flanges and installation accessories

Product Description

The Kooks 2861H420 long-tube header and catted Y-pipe kit is a premium performance upgrade engineered for select GM Gen-V 6.2 L V8 trucks and SUVs. By replacing the factory manifolds and mid-section with 1.875" primaries and a high-flow 3" inlet x 3½" outlet Y-pipe, the system delivers vastly improved exhaust flow, reduced back-pressure, and a more aggressive exhaust tone.

Constructed from aircraft-quality 304-stainless steel and expertly mandrel-bent, this kit bolts up using existing OEM mounting locations for a clean installation experience. The inclusion of the catted connection maintains a near-factory exhaust path while enhancing performance. It is ideal for enthusiasts seeking major gains in trucks such as the Silverado, Sierra, Escalade, Tahoe, Yukon with the 6.2 L engine.

Please confirm your vehicle's model year, engine (6.2 L V8) and that your platform matches the fitment list above. Use in California or states with similar emissions restrictions may require additional certification - this kit is **not CARB exempt**. Fitment beyond the years listed above is currently unconfirmed and should be verified before purchase.