TOMEI EXPREME EXHAUST MANIFOLD For EVO 4-9 4G63 193083Brand TOMEI Product Number 193083 Compatible Car EVO 4 9 Compatible Engine 4G63 Product Description As with the other EXPROME series, the exhaust manifold for 4G63 finally completed through a long test period in order to realize balanced performance from low to medium speed to high speed like the other EXPLUMS series. At the early stages of development, we started testing with a genuine engine to know the potential of genuine exhaust manifold,