Just my personal opinion, but I think Akarpovic didn't do THAT great of a job on the exhaust system for the 370z. Their HP gains aren't something to die for, their sound is meh and also the weight savings isn't as crazy as it is on the e92 system. The price is double the price of an Fast Intentions exhaust, and iirc Fast Intentions has better gains and better sound, while the weight difference isn't too much.
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