10psi outer spring for GFB EX38 and EX44 external wastegates. Combine with the 5psi inner (7205) and 7psi middle (7207) 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.