Quote:
Originally Posted by Norcalmav23
#1 that is accurate, you worded it correctly
#2 yes that is a good set up, brand names for the headers etc would help though
#3 yes that is for the most part accurate
#4 Correct, a tune would most likely make everything feel "smoother". A tune will also most likely increase gains from your header... thus making it noticeably improve performance.
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^What he said.
If I were you, I'd keep what you have and look for a way to quiet it. Example would be the Nameless downpipe with added resonator option. Otherwise if the car's way too loud for you, then keep the header, return the exaust, and get something quieter than Nvidia.
As for the tune, you really should have one when running an aftermarket header. If your worried about voiding the warranty, then get something like Unichip that doesn't flash the ECU, but instead modifies its outputs. A tune will smooth the engine while unleashing the real power gains your mods are capable of.