Features Tube Outside Diameter: 1-5/8" Collector Diameter: 2-1/2" Reducers: 2-1/2 to 2-1/4" Flange Style: Oval Port 3 Stage polish finish 1 5/8" Primary Tubes Gaskets and Hardware Included Fits cars using an original V-8 pitman arm (some aftermarket arms may cause interference) Will work with side engine mounts with the engine in stock location Fits standard and Vortec-style small-block Chevy heads (not D-port, LT-1 or ZZ-4) Fitment 1955-1982 Chevrolet Corvette 1955-1957 Chevrolet Bel Air 1957 Chevrolet Del Ray 1955-1957 Chevrolet One-Fifty Series 1955-1957 Chevrolet Sedan Delivery 1955-1957 Chevrolet Two-Ten Series Fits Small Block Chevy 262, 265, 267, 283, 302, 307, 327, 350, 400 CID Engines with standard exhaust pattern Hot Rods, Rat Rods, Street Rods, & Nostalgia Rods running a 1955-1957 Chevy Engine