Brand New 1955-UP Small Block Chevy Hugger Headers. Stainless Steel block hugger type shorty headers. Heavy duty with 1 5/8 Inch tubes and 3/8 Inch thick flange. 2 1/2 Inch collectors and 2 Inch reducers. Work best with straight plug heads, will not work with angle plugs. From the bottom edge of the head these come out 4 1/4 Inches to the outside of the middle tubes. Set include headers, bolt on reducers, exhaust gaskets, collector gaskets, and all necessary bolts. Fits 283 305 350 400 SBC Small Block Chevy.