1-3/4" X 1-7/8" X 3" SS STEPPED HEADERS. 2015-2020 SHELBY GT350 11542300

1-3/4" x 1-7/8" x 3" Stainless Steel Long Tube Stepped Headers. 2015-2020 Ford Mustang Shelby GT350 5.2L 4V 304 Stainless Steel Construction 3/8" Thick Laser Cut Flanges Round Port Stock Bolt Pattern 1-3/4" x 1-7/8" Mandrel Bent Primaries One-Piece Collector with 3" Ball and Socket Outlet Includes 755989 Gaskets, BK101 Header Bolt Kit, BK107 Ball and Socket Bolt Kit, and 2) CAS-105979 Oxygen Sensor Harness Extensions required for Installation. Does not connect directly to OEM Exhaust. Use of Headers requires Kooks Exhaust Kooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best Headers and complete exhaust systems for your street, race and off-road applications. We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations. Now with three generations of family leadership, we are proud to say that all of our products are handcrafted here in the USA and we are proud to still be independently owned and operated. And don't forget, "Get Kookin with KOOKS!" Manufactured In The USA. Kooks Uses T304 Aircraft Quality Stainless Steel. Kooks Products are Backed by a Limited Lifetime Warranty To the Original Purchaser. Kooks Products Are Dyno And Race Tested and Designed For Maximum Power.