The smaller set ofTri-Y headersmeasure 15/8-17/8 inches. Along with the headers, Schoenfeld sent us collectors for both size headers and an X-style crossover pipe to complete the test. See All 19 ...

These Tri-Y style headers are built with 5/16 inch thick machined flanges at the cylinder head and 3 bolt outlet flanges. The Oval port, under the chassis exit design is made from 16 gauge tubing ...

1953 Chevrolet Bel Air “Tri-Five Angel” Restomod Begs to Go Cruising. Published: 16 Jun 2020, 15:43 UTC • By: ... Holley four-barrel carburetor, and shorty headers, ...

The number or tri-five Chevys laid out before us was almost hard to comprehend. Thousands of tri-five Chevys (Chevys build in 1955, 1956, and 1957) were sprawled out as far as we could see.