No I think ull find these leak because the part that separates the wastegate from the impeller isnt the correct size and never is and leaves gaps hence the blow buy the only way to do this right is to weld the separator on to the turbo or make sure it's machined/ made bang on If u tighten your actuator ull just increase the boost U must of got lucky with your's it obviously swells when hot and fills the hole If fitted loads of these and they all leaked = pish wate of money buy an external waste gate manifold cause ull experience boost creek with your ct9 anyway and an external will fix that to