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Chevy Big Block Jet Boat Above Transom Exhaust Header Kit - BBC V8

Made of high quality steel with 2-pieces 4-1 (8-2-1) direct bolt-on design

TIG welded CNC machine flange

O2 sensor bung insertion / Metal gasket included / Inlet: 2.25" / Outlet: 4" / Non water injection ports above transom headers

Increase high flow air, instantly gain 10 to 15 Hp. / Tq

Application: Please check part finder on top of the page (Professional Installer is Highly Recommended) (No Instruction Included)