Rays has come up with a solution to add center caps to your TE37SL and TE37RT wheels! Those wheels were specifically designed to be very light so they went away with a lip on the center hub that allows other Rays wheels to fit a center cap. They know not everyone is using the SL & RT versions for just racing so they are now offering a center cap adapter solution that can fit the popular Rays center caps everyone loves! These will work with most TE37SL and TE37RT wheels in the 5x114.3 and 5x120 bolt pattern. The 5x114.3 will use the 3.0mm o-ring and the 5x120 will use the 2.5mm o-ring. Both o-ring sizes are included. Application: Volk Racing TE37SL 17", 18" & 19" (5x114.3 & 5x120) Volk Racing TE37RT 17" & 18" (5x114.3) **Sold Individually.*** PICTURE IS FOR REFERENCE PURPOSES **Does not Include RINGS* Features Center Cap Adapter Ring in Black Includes both 3.0mm & 2.5mm O-Rings Designed to allow Rays Center Caps to be installed on TE37SL & TE3RT Wheels Priced Individually Made in Japan Extended Information Type: Center Cap Adapter Finish: Black Fitment: TE37SL & TE37RT Material: Aluminum Sold: Individually Warranty: Manufactures Defect