Skunk2 High Lift Valve Springs and Titanum Retainers Toyota Supra MK5 BMW B58 S58 exterior Incompatible with the FN2 Type

Incompatible with the FN2 Type R

5 Tilted & Tapered Hi-Velocity Runners

Spark plugs for your car must be the proper size and shape to fit the head opening

L & R Series Engines

Skunk2 High Lift Valve Springs and Titanum Retainers Toyota Supra MK5 BMW B58 S58 exterior Incompatible with the FN2 TypeThough Ultra Stage1 cams are compatible with stock OEM valve springs, we recommend the use of Skunk2 upgraded High Lift Valve Springs along with Titanium Retainers (PN: 313 14 1000) for the B58 as long term durability using stock valve springs is unknown. All Skunk2 valve springs control are made from super clean high tensile strength chrome silicone wire, shot peen stress relieved, and heat treated to provide consistent and reliable long term