Forge Valve Spring Kit for R55, R56, R57, R58, R59, R60, R61 MINI Cooper S turbo withN14 or N18 engine. If you already have the Forge Recirc or Atmospheric vent valve on your MINI and plan to add more boost via tuning this spring upgrade kit may be needed. The springs in the Forge valves are interchangable based on boost levels.
This kit contains 4 springs:
1x Green Spring for 5-15psi Boost
1x Yellow Spring for 15-23psi Boost
1x Blue Spring for 23-30psi Boost
1x Red Spring for 30+psi Boost
Fits:
- 2009-2011 Cabrio S R57
- 2011-2014 Cooper S R56
- 2011-2014 Clubman S R55
- 2011+ Cabrio S R57
- 2011+ Countryman S R60
- 2012+ Coupe S R58
- 2012+ Roadster S R59
