After testing a few clutches for K24 swaps, the ACT HD Street Clutch Kit (ZM2-HDSS) is our favorite for K swaps retaining a Miata 5 or 6-speed transmission. This clutch kit provides pedal feel a bit more firm than stock, smooth engagement, and a 245 lb. torque capacity. Don’t over-clutch your setup. For any naturally-aspirated K swap, this is the clutch to have for street or track use.
This kit works for any 1.8L Miata, 1994-2005, and includes the clutch disc, pressure plate, release bearing, pilot bearing, and alignment tool. Note that you’ll discard the pilot bearing that’s included for a K swap, as your KMiata flywheel has a bearing pre-installed.