2015 NISMO Headers & Exhaust
Curious what results other NISMO owners experienced if they replaced their NISMO headers with aftermarket ones. Did you see a significant gain in HP and torque?
Second question is about retaining the NISMO cat back system and just doing a muffler delete coupled with adding high-flow cats (HFC). Has anyone done just this or did you replace the entire system? Did you see a significant gain in HP and torque? Did you go with HFCs?
I'm contemplating just going with HFCs and the rear muffler delete unless there someone experienced a major gain in HP and torque.
I'll definitely be replacing the upper and lower plenums and opting for an UpRev tune.
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