Stance XR1 Coilover Set Subaru WRX 2002-2007 / STI 2004 vendor_GrimmSpeed increased boost pressure and free

increased boost pressure and free up lots of power

Performance-Driven Design: Increases horsepower and acceleration by improving airflow

unqiue bends smooth transitions to increase HP

OBD-II scan tool functionality

Stance XR1 Coilover Set Subaru WRX 2002-2007 / STI 2004 vendor_GrimmSpeed increased boost pressure and freePart #: STA ST GDB XR1 Originally designed for use in professional motorsports, inverted monotube technology has many advantages over upright monotube dampers. Our 45mm strut shaft offers increased lateral rigidity over competitors upright dampers that use 20mm shafts. If the shaft is not stiff enough it can cause the damper to bind under heavy loads and limit the suspension travel leading to premature wear on the shaft seals & piston bands, causing