a friend of mine hurt his dart...all four center pistons caved in,and started coming apart at the plug location.he runs race gas,and has stage IV ported heads..WTH?.any ideas??? anyways.but everything else looks great! his are trw L2293-.030"+..i know they were bought out,speed pro?.i just cant find a catalog listing for this piston.any ideas??? i have to call mancini to see if they are avalible i guess,under another part number?? any help would be great guys! thanks,mike