If its for performance check out Engine Masters on Prime if you have it - they ran dyno tests on a variety of exhaust tube diameters as well as common mufflers, headers vs manifolds etc
1949 Chevrolet 3/4 Ton - Still Solid. Regular Driver OT Vehicles: 1925 Hudson Brougham Super Six 1950 Chevrolet Styline (Parts) 1952 Canuck Pontiac Sedan Delivery (Well Underway) 1973 F250 4x4 Highboy 1977 F250 4x4 Lowboy
