Radium Engineering FCST-X Spare Drop-In Pump Module (Walbro F90000267/274/285) - 20-1998 fits_2015-`BMW`M4 SHIM SET - Includes 20

SHIM SET - Includes 20 shims/2 of each size

Designed as a full replacement for the OEM mirror caps this set offers a clean aggressive look while maintaining factory-like fitment

Improved safety and performance without the requirement of new springs (use of series spring possible)

Performance Gains: In house dyno testing produced gains of up to +14 horsepower and +22 lbs

6 feet of 1-in hose compatible with most PCV systems

Radium Engineering FCST-X Spare Drop-In Pump Module (Walbro F90000267/274/285) - 20-1998 fits_2015-`BMW`M4 SHIM SET - Includes 20Spare fuel pump module for Radium FCST X fuel cell surge tanks. An extra module assembly allows for quick pump change outs during competitve events. Pumps sold separately. Installation instructions available at www. radiumauto. com