DTR Design TSX 4-2-1 street header TSX CL7/CL9 TSX:44mm standard 2.5 outlet Available for B18-B20 and high

Available for B18-B20 and high output B20 (54mm secondary) 4-2-1 design is great for midrange and top end power with maximum ground clearance for street driven longevity

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

DTR Design (imported)304 stainless  B-series 4-2-1  two step header 44mm - 48mm to 50mm secondary with a standard 64mm donut gasket exit

multi step 44mm - 48mm header

DTR Design TSX 4-2-1 street header TSX CL7/CL9 TSX:44mm standard 2.5 outlet Available for B18-B20 and highDTR 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.