5psi inner spring for GFB EX38 and EX44 external wastegates. Combine with the 7psi middle (7207) and 10psi outer (7210) springs for base boost of 5, 7, 10, 12, 15, 17 or 22psi.

Genuine GFB (Go Fast Bits) part, supplied by Boosted Performance Parts, Sydney. Not sure it suits your car? Contact us with your make, model and mods before ordering.