Quote:
Originally Posted by 2011 Nismo#91
So saying the FI exhaust addes 20hp to a Z seems about right, 10hp (as apposed to 8hp) or so because it's slightly larger and less restrictive with the other 10hp coming form the Tune.
So you better really like that sound because your paying alot of money for 2hp and losing a lot on selling a used exhaust.
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Is this correct? Is the vehicle that FI dyno'd for their chart (showing a 20hp gain) tuned? I was under the assumption that it was simply bolted on and dyno'd.