Hello everyone, new to the whole forums ordeal. I recently bought a 2003 Infiniti G35 Sport Coupe. It's got the most power out of any car I've had and it extremely fun to drive. I've been searching for new things to add to my car to gain more horse and torque. Down the road I hope to get a turbo kit for the car, but for now I'm looking for things that don't cost thousands of dollars. Right now I have a few mods on the car such as a Aem cold air intake system, headers, a high flow cat back Hks exhaust system, K-sport coil-overs, 20'' MRR GT5 rims and a Seibon carbon fiber hood. I have a few other additions for the interior as well. I'm looking for any recommendations anyone has that I may of not thought of yet. I've been looking at a 5/16 plenum spacer to help add a few. Friends have told me about proformance chips, but I find those sketchy and not sure about them. Any thoughts would be amazing.

IMO, anything that's below 10-15HP is unnoticeable and a waste of money. I would have argued that the cold air intake wouldn't have done much. Tunes IMO are a waste of money on these cars. There's really not much other easy HP without forced induction or digging into the engine..

One thing you could research (don't know a lot about this), but if there's a differential swap you can do on it to give a higher gear ratio.

Chips are a gimmick