Non-resonated secondary catalyst bypass for the BMW G8X M3 and M4 (S58 engine). Constructed from T304L stainless steel with mandrel-bent 3.00 inch (76.2mm) primary piping, the non-resonated design eliminates mid-range resonance for a pronounced, race-focused tone. Hand-finished welds and CNC-formed flanges deliver OEM+ build quality with direct bolt-on installation.
Key Features:
T304L stainless steel, mandrel-bent 3.00 inch primary piping
