1991-1998 Nissan 240sx $60 NICOclub Rating System 98S14inAZ This will show you how to install a 248 / 248 duration cam set up. For the newbies… 1) Turn engine manually to achieve TDC (top dead center, lobes facing out or line up the markings on the crank pulley.) 2) Use two exhaust cams (the ones […]