95mm Billet Flat-Top Diamond Piston for 489cc, 460, and GX390 Engines Our lightweight flat-top billet piston is the perfect upgrade for your 95mm bore clone engine (440, 460 & 489). This piston, along with a billet rod, will complete your bulletproof engine build. Add reliability and horsepower to an already strong platform. Extra-deep valve pockets for high-lift cams. This is a flat-top piston and will increase your compression!
