GFB EX50 50mm V Band External WastegateWith the manifold glowing the boost never varies" Joe Signorelli Designed to cope with the brutal conditions of extreme exhaust temperatures, the EX50 features not only a huge flow capacity, but also a compact size that is unmatched by competitors for a 50mm wastegate. Supplied with a 13psi spring 7psi and 9psi springs also available that can be ganged together with the supplied 13psi spring in various combinations to allow boost pressures of 7, 9,