GFB EX38 38mm V Band External WastegateThe EX38 features a 38mm valve and comes standard with a 10psi spring. Additional springs are also available by using various combinations of 5psi, 7psi, and 10psi springs, you can achieve base boost pressures of 5, 7, 10, 12, 15, 17, and 22psi*. Standing only 93mm tall, the EX38 is shorter than its nearest rival. The inlet flange I. D. features a tapered entry to assist a smooth transition from the exhaust pipe into the valve, and the seat I. D. is