altezza 3sge motors

[Celica RA45]

are any guys there racing there manual 3sge with the titatium valves ,as mine has the TRD cams and throttles exhaust and the valves seem to be pounding into the seats only inlet valves not exhaust ,every time after racing the shim clearences close up ,this time had seats recut and put new valves in ,so will see .but asking as they seem to race altezzas in nz and not here in oz regards glenn