GFB, EX38 – 38mm V-Band Style External Wastegate

The 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*.

5 psi = 0.34 bar
7 psi = 0.48 bar
10psi = 0.69 bar
12 psi = 0.83 bar
15 psi = 1.03 bar
17 psi = 1,17 bar
22 psi = 1.52 bar

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 larger than other wastegates of the same size for extra flow.

The EX38 is directly compatible with TiAl MV-S flanges, meaning you can use the EX38 on turbo kits designed for TiAl wastegates

When it comes to external wastegates, some things you want big, others you want small – like big flow, small size, right? GFB offers a range that are among the most compact external wastegates in their class, being shorter in height than their closest rivals without sacrificing flow.