Dinan Valved Axle-Back Exhaust BMW X1 X2 sDrive28i F48 F39 - D660-0088
The Dinan D660-0088 Valved Axle-Back Exhaust is designed for 2017-2022 BMW X1 sDrive28i and 2018-2022 BMW X2 sDrive28i applications using the F48/F39 chassis. The system uses T304 stainless steel construction and retains factory valve control.
Dinan specifies 70mm piping, a streamlined muffler, and dual 4-inch double-walled polished clamp-on tips with laser-engraved Dinan logos. The system is engineered for a deeper, fuller exhaust note while reducing low-RPM drone.
Dinan lists maximum gains of up to 5 horsepower and 4 lb-ft of torque. D660-0088 is for the sDrive28i application; the xDrive version uses D660-0089.

