didnt really no the difference between external and intenal wastegates until tonight when i done some reading. still needing a bit of help on a few things that i cant really find on google. 1) i know that you get different sizes of external wastegates. how do you determain what size you go for? 2) im unsure about the exhaust piping for the external wastgate, ive seen the manifold which vents a pipe into the atmosphere is this basically just like a screamer pipe but actached to the manifold? 3) where abouts do you put the external wastegate? this is proberly a silly question but its my first turbo car and i want to learn as much as i can before i start modding. Cheeers Aidan