any base boost setting that your desire (within reason), and allow for higher boost to be run without boost bleed down at high RPMs. JWT just takes stock wastegates, cuts the wastegate arm, threads the ends of each arm and adds a turnbuckle, which then allows them to be adjustable. It makes for a great set up. By the way, after JWT went to their own adjustable wastegates, they held as much native boost as the HKS model. Buy Joe's! Take care, Mark