Sorry to piggyback on this thread, but I am also starting to plan out an upgrade plan for my 2015. In the 8 years I've had it I too have only done routine maintenance, window tint, and Pilot 4S's.
Someone in my area is giving away the Nismo OEM exhaust in excellent condition. I like the sound of the engine from inside the cabin and do not want the exhaust to over power it. Mainly looking for something that will improve performance (for eventual SC build) without the obnoxious exhaust note.
The HKS above doesn't sound bad, but how much louder is it over the stock Nismo exhaust and will I hear much of it in the cabin? And then for hp/tq gains later on would it be much of a difference over the Nismo?
Just thinking that if there isn't much of a performance gain later on when the SC build is done, that I could save myself $2K and be happy with the Nismo OEM exhaust.
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