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Kooks COMPETition only products are built for use in motorsports competition only. these products are not intended for street use.
Competition Only

3" SS Competition Only Y-Pipe. 2009-2010 GM Truck 6.2L. Connects to OEM.

1-7/8" Stainless Headers. 2011-2014 Shelby GT500.

1-3/4" Stainless Headers. 2011-2014 Shelby GT500.

1-7/8" Stainless Headers. 2011-2014 Mustang GT 5.0L.

1-7/8" Stainless Headers w/o Emissions Fittings. 1997-2004 Corvette.

1-3/4" Stainless Headers w/Emissions Fittings. 2001-2004 Corvette.

2-1/2" SS Competition Only X-Pipe. 1999-2004 Mustang. (Connects to OEM)
3" x 2-3/4"(OEM) SS Competition Only H-Pipe. 2012-2013 Mustang Boss 302 5.0L.

1-3/4" x 2-1/2" Stainless Downswept Turbo Headers.

1-3/4" x 2-1/2" Stainless Upswept Turbo Headers.

2" Stainless Headers & Comp. Only OEM Conn. Pipes. 2016-2019 Cadillac CTS-V.

1-7/8" Stainless Headers & Comp. Only OEM Conn. Pipes. 2016-2019 Cadillac CTS-V.

1-3/4" Stainless Headers & Competition Only Conn Kit. 2015-2023 Mustang GT 5.0L.

3" Competition Only Header-Back Muffler Delete Exhaust w/Black Quad Tips.

1-5/8" Stainless Headers. 2005-2010 Mustang GT 4.6L 3V. (Auto Trans.)

1-5/8" Stainless Headers. 2005-2010 Mustang GT 4.6L 3V. (Manual Trans.)

1-3/4" Stainless Headers. 2010-2014 F150 Raptor 6.2L 4V.

1-5/8" Stainless Headers. 2009-2010 F150 5.4L 3V.

1-3/4" Stainless Headers. 2015-2020 F150 5.0L 4V.

2" Stainless Headers. 2016-2019 Cadillac CTS-V.

1-7/8" Stainless Headers. 2016-2019 Cadillac CTS-V.

1-3/4" x 1-7/8" x 3" SS Stepped Headers. 2015-2020 Shelby GT350.

3" Competition Only Header-Back Street Screamer Exhaust w/Polished Quad Tips.

3" Competition Only Header-Back Muffler Delete Exhaust w/Polished Quad Tips.