Item description from the seller
 
Item Included: Gasket with Screw
Mounting Style: Flange-Mounted
OEM / Non-OEM: Non-OEM
Inlet / Outlet: 1.65" / 2.01"
 
Fitment:
 
Fits All Small Block Chevy V8 Engines from '55+ using the Standard Exhaust Pattern - 283, 305, 327, 350, 400 etc. (except 1971 Chevrolet Nova, 1972 Chevrolet Caprice, 1983 Chevrolet Caprice Classic Sedan 4-Door 5.0L, 1984 Buick Regal, 1986 Chevrolet Caprice 5.7, 1987 Chevrolet Caprice, 1978 Chevrolet corvette, 1973 Chevrolet Nova Base 5.7L 350)
For Year and Model, Please Check Compatibility