DTR Design TSX 4-2-1 street header TSX CL7/CL9 TSX:44mm standard 2.5 outlet 48mm Tri-Y Max only recommend

48mm Tri-Y Max only recommend for max effort high compression builds

multi step 44mm - 48mm header

multi piece

3-1 double slip merge collector

AC/PS compatible

DTR Design TSX 4-2-1 street header TSX CL7/CL9 TSX:44mm standard 2.5 outlet 48mm Tri-Y Max only recommendDTR design CL7 CL9 TSX 4 2 1 street header available in standard 44mm stepped or 48mm stepped big tube tri Y Max. 4 2 1 design for midrange and top end power. 304 stainless steel with all supplied adapter pipe gaskets and bypass hardware. US modified 2. 5 3 v band transition option available for high output 48mm include female v band ring and clamp for exhaust retrofit. 48mm Tri Y Max only recommend for max effort high compression builds.