It wont cause "problems" like your thinking!
Esp. if it's just stage 1 which you should be at with completely stock.
Definitely do the chargepipe. I dont have a tune and I did it.
The DP is a must if you go stage 2!
Seems like the down pipe for these cars is a popular and effective mod, especially when the boost is increased. I know the CEL codes can be cleared with ECU changes but how is everyone passing local state inspections? Are you guys taking the pipe in and out for your yearly inspection?
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