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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

2-1/8" x 2-1/4" x 4" Stainless Steel Headers w/Venturi Collectors.

2-1/4" x 2-3/8" x 4-1/2" Stainless Steel Headers

2-3/8" x 2-1/2" x 5" Down Swept Dragster BBC Headers

2-1/8" x 2-1/4" x 4" Stainless Steel Headers - Strut Front End Door Car - BBC.

2-1/4" x 2-3/8" x 4-1/2" Stainless Headers - Strut Front End Door Car - BBC

2-3/8" x 2-1/2" x 5" Stainless Headers - Strut Front End Door Car - BBC

Pro Mod 2-1/2" Stainless Steel Zoomie Kit; Single Bend does not include flange

1-3/4" x 1-7/8" x 3-1/2" Tri-Y Header w/Turnout. LSX Engine in Troyer/Spafco.

1-7/8" x 2" x 3-1/2" Tri-Y Headers w/Turnouts. LSX Engine in Troyer/Spafco.

3" Left Side Connection Pipe (Header to Y-Pipe) for NLMS Exhaust.

3" Right Side Connection Pipe (Header to Y-Pipe) for NLMS Exhaust.

1-5/8" x 3" Steel For: NASCAR Late Model Stock (603/604 Crate Engine) (LMS GM)

NASCAR K&N Series/ARCA 3 1/2" A Pipe X 8"(4 3/4" Wide at X)

3-1/2" Steel 70 Degree Bends. 16 Gauge. Trimmed and Expanded for the K&N X-Pipe

3-1/2" x 48" Oval Mild Steel Tailpipe with Oval Slip Joint Inlet - No Taper.
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3 1/2" x 48" Oval Mild Steel Tailpipe with Slip Joint - Tapered to 1 5/8" Tall

1-5/8" x 3" Mild Steel Replaces Part: 1509-09-SMHARRIS-CR

2-1/2" 90 Degree Mandrel Bends 16G 304 Stainless Steel - 3.50" CLR

3" x 3-1/2" Mild Steel NASCAR Late Model Stock Exhaust Kit with Y-Pipe.

1-7/8" Stainless Headers & Competition Only OEM Conn. 2010-2015 Camaro SS/ZL1.

3" x 2-3/4"(OEM) SS Competition Only H-Pipe. 2011-2014 Mustang GT 5.0L.

3" SS Comp. Only Turbo Down Y-Pipe. 2011-2014 F150 EcoBoost. Connects to OEM.

3" x 2-3/4"(OEM) SS Competition Only X-Pipe. 2011-2014 Mustang GT 5.0L.

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