Hey everyone, I wanted to start some upgrades on my car especially with the sound and its air flow and was wondering if you guys had the choice of choosing either two of the three listed parts, which one would it be and why? I am on a budget and prefer to upgrade a maximum of TWO of the stated parts. I have a 2010 g37S sedan. If you could explain the benefits of the upgraded parts that would be great as well.

ALSO, if you could recommend an exhaust preferably with a limit of $600 which one would it be? Thanks everyone in advance!!

 

After researching this myself for the better part of a year and waiting for the cash to build up. I would go for an intake manifold upgrade either M370 or Z1, leave stock airbox for now. Get the HFC and leave the exhaust stock for now. Those two choices are purely performance based. I believe the stock airbox is sufficient enough to feed enough air I believe its the manifold that is the bottleneck (thats my perspective, no evidence to give you to prove that). If I had to choose a third that you didn't list it would be rear sway bars. Fourth would be a tune assuming you didn't do any more bolt on upgrades.

 

I think alot of your questions would be answered by looking at the thread titled "what would you do first....." from just a few days ago. Very similar topic with pretty good explanations.

 

The biggest bottleneck in the system are the cats. I wouldn't suggest a manifold swap until much later in the build if at all depending on what your goals are. If you're chasing top end then Stillen Gen 3 CAI or Takeda. If you're chasing midrange then R2C. The manifold will generally give you better midrange across the band but you're going to need to tune in order to optimize it.

I went intake, RHFCs then CBE.

 

very true. Just scroll past all the non-sense (I apologize for half of it) and you should be good.