Detailed product specifications Bore 82.50 mm Stroke 92.80 mm JE Pistons compression ratio (CR) 10.3:1 OEM compression ratio (CR) 9.6:1 Dome volume (CC) -3.0 cm Spring height ( CH) 29.60 mm Needle diameter 21 mm Features Accepts turbo and nitrous; full round piston coating Fits Audi / VW 2.0 16V TSI EA888 chain engines (CAWA, VAWB, CCTA, CCZB, CAEA) JE Perfect Skirt patented coating eliminates piston knocking, false knocking and cold start wear. For the first time, alloy pistons 2618 can be installed with piston-to-cylinder wall clearance close to the piston OEM!