I also modified the inventory 16v throttle bodies ISCV, plated the back again and additional a brass barb. and mounted it.Block: The 4AG block is usually a cost-free revving and robust base conclusion. A stock block will survive in excessive of 350 HP if air-charged within the 8000 RPM assortment, or 250 HP while in the 10000RPM assortment. The 2nd