Your car is not that different from my G35 and don’t get a Megan exhaust. If you as close to OEM as possible get a borla or nismo. I know more than 99% of people on here about VQ35 cars PLEASE take my advice. You are on point with the lower plenum, spacer, and etc but Megan is garbage. You pay for what you get. I spent over 7k on my G with good and bad parts. And back to the UpRev tune. I highly doubt synapse has ever installed UpRev software or worked on many infinitis. Not saying they don’t know there shit about cars or how to tune but putting your Infiniti in the hands of someone that has little experience if any with UpRev is stupid IMO. Go to a reputable tuner who knows there shit about M or G’s.