External wastegate

Asked by Jul 21, 2016 at 01:31 PM about the 2014 Subaru Impreza WRX Limited

Question type: General

I am in the process of doing an external
waste gate with an up pipe and dump tube
swap. I've heard that you need to get a pro
tune when you do this. Why is that? Would
you be able to not get the tune and still be
able to drive the car without any CEL?

1 Answer

8,030

Throttle mapping and fuel/air curves to keep AFR correct. You do NOT want to blow this up!

Your Answer:

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