I own a 2012 g37s and currently have a long tube injen cai and have the motordyne e370 exhaust on the way. My budget is shrinking and was wonder what I should get next. Was thinking either the motordyne manifold or art pipes. If anyone could help me choose between the two or recommend something else I would greatly appriciate it.

 

You would probably see more gains from the RHFC's so I would go that route.