HOT CAMS RACING CAM STAGE 1 TRX250X '87-92 TRX300EX '93-07 FITS 1987-1992 TRX250X Honda PART #1058-1. High performance racing camshaft No core required Designed to use stock valve springs and rockers in most applications Adjustable cam sprockets supplied with some models Make sure to read title to know what you are getting.