Exhaust Valve 3.0L 1999 Lexus GS300 - EV944.7 Exhaust Valve . Fits: 92-05 Lexus, Toyota / GS300, IS300, SC300, Supra 3.0L L6 DOHC Naturally Aspirated, TurbochargedFitment Notes: Nitride Coated, 1 Groove, 29mm Head Dia., 6mm Stem Dia., 99mm O.A.L.,...