Can you run 2 38mm external wastegates instead of 1 60mm wastegate and still go as good?

Yes, you can run two 38mm external wastegates instead of one 60mm wastegate, as long as the combined flow capacity of the two wastegates meets the requirements of your engine's boost levels. Two smaller wastegates can provide more precise control of boost pressure and can help distribute exhaust flow more evenly. However, proper tuning and installation are crucial to ensure that the system functions effectively and avoids issues like boost creeping. Ultimately, it can work well if designed and implemented correctly.