Clutch Masters 12-13 Honda Civic Si 2.4L 6spd FX350 High Rev Sprung Clutch Kit *Req. cmFW-320-SF08320 HRFF X Description 110% Increase in Holding Capacity STREET RACE Kits beginning with 08240 for the Acura Honda K24 require a Hondata Flashpro or other engine management system to be used since the flywheel's weight is lighter than OEM and will cause a check engine light to occur if not properly tuned. If you DO NOT want to use an aftermarket engine management system, then you must use kit number that begins with 08320. Kit number 08320 is to OEM