FC3S ACT Streetlight Flywheel

ACT 1987-88 Turbo2 Mazda RX-7 XACT Flywheel Streetlite ( 13.8 lbs) 

Large drop over OEM S4 FC3S at 31 lbs, will rev faster, and put less stress on engine bearings( especially the rear main bearing). Requires an ACT counterweight of same series engine( S4 are different than S5). Plan on replacing rear main bearing seal at the same time doing this job( not included). 

Countweight(CW) bolts are including with purchase of CW.