Yes you get a higher exhaust flow rate with Test Pipes but your exhaust will get louder and smell like fuel mmmmm and you have the chance of getting a check engine light, but that can be fixed by O2 sims or Non foulers or Steal whool trick
DAN
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-My BRZ with exhaust will decimate all if we overnight parts from Japan-
10 Civic EX Sedan- Current Daily
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