Heavy Hitter: As the very first aftermarket retrofitting part Morimoto offered, the ZKW-R Clear Lenses continues to be a hot seller. It defines the term "performance gain" on projectors such as the popular Acura TL bi-xenons. Replica+ Easily matching & beating the OEM 3" ZKW lens from the BMW E46 that we benchmarked for this version, the optical clarity of the ZKW-R Clear Lenses is unsurpassed. Years ago, retrofitters used to pay $200 for a set of those stock lenses. E46 Spec: The ZKW-R Clear Lenses work perfectly on Bosch Bi-xenon (AKA "E46") projectors as-is. No Brainer: Adding a set of clear lenses to your OEM headlights or projector retrofit with OEM projectors should be a "no-brainer". Not only are these Morimoto lenses an inexpensive upgrade, but they allow the projectors to perform to their maximum potential in every aspect. Size Matters: When picking out a pair of clear lenses, it's not about which model is "best" - it's about compatibility. The diameter AND focus height of the lens are both very important.