JE Pistons Audi TT RS 2.5 TFSI 5 Cyl Ultra Series 82.5mm Bore Piston Kit (Single) fits_1964 1969`Pontiac`Tempest`Safari~1971 1974`Pontiac`Ventura`Base~1973 1974`Pontiac`Ventura`Custom~1974`Pontiac`Ventura`GTO 1964 1968 Mercury Montclair Base 1960 1972 1964 1968 Mercury Montclair Base 1960 1972 Mercury Monterey Base 1962 1963 This system features the S Type sound with no drone inside the vehicle therefore reducing piston crown temperatures and improving exhaust gas scavengingHigh Strength Wrist Pins: Premium thick wall wrist pins are manufactured by Trend Performance in the USA and are designed for the demands of high performance power adder buildsLateral Gas Ports: Help maintain power producing ring seal at the top compression ring and small end lubricated for reduced heat