Sportsman XR-1 Round 3.5in In/Outx15in Muffle Wheel Spacers Add an impressive 23 horsepower

Add an impressive 23 horsepower and 15 lb-ft of torque when used with the DINANTRONICS Performance Tuner as well as Dinan intake and exhaust

The factory computer-controlled exhaust valve is eliminated

on the G11/G12 750i equipped with a Dinan Exhaust

Dinan embraced this and over the years mastered its craft into a kit that not only satisfied the desire for proper road feel but also made it livable for everyday driving

Dinan also incorporates a Helmholtz chamber design that reduces resonance or'drone' at low RPM

Sportsman XR-1 Round 3.5in In/Outx15in Muffle Wheel Spacers Add an impressive 23 horsepowerMuffler XR 1 Sportsman 3. 5 in Center Inlet 3. 5 in Center Outlet 15 x 5 in Round Body 20 in Long Stainless Natural Universal Each