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People who replace their headers and don't get a retune should review data logs. Review a log with a header/no tune to header/ w tune. Observe your AFR and tell me if you still think getting a header with no tune to support the change is a safe idea. IMO either you get a tune with your header or you don't get a header at all.
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FRS
Current mods: K&N air filter, OFT, OFH, berk high flow cat front pipe, Q300 exhaust, lighter wheels
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