RF Round 4″ Exhaust Silencer Box – 400mm x 57mm, Centre-Centre

A universal stainless steel silencer box for custom exhaust fabrication. The round 4″ body is 400mm long with a 57mm centre inlet and 57mm centre outlet running in-line, so gas flows straight through for free-flowing performance while the packed core tunes a deeper, refined note. Ideal as a centre or rear silencer across a wide range of vehicles, with universal weld-in fitment.