Here’s my e30 m20 stroker fitted with a precision 6266 . Headers fit nicely and there’s plenty of clearance from the hood. I did have to add a brace from the turbo to the engine due to the bolts on the flange loosening from the torque . I would recommend doing this if you have an m20 . The headers are good so far at 630hp 15 lbs of boost. ~ Daniel Crouse