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Discussion Starter · #1 ·
I just got a 06 wrx stock, high miles but I work for a shop that'll let me do whatever I want to it, I'm doing a cyl 4 coolant mod, a bigger aluminum radiator, and an oil separator for longevity. My question is if I get a full exhaust do I need a tune. Car came with a cobb but I'd rather do pro tuning if its gonna need it, future goals are a same size but better turbo and maybe better tmi.
 
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