Costs per HP gain unworthy for our Z's

flashburn

Depends on what you are looking for. If you are solely looking for performance, then yes, the gains get exponentially smaller as you get more and more bolt-on mods.

As others will say, the best bang for the buck is either test pipes or HFC's. You also get a more aggressive exhaust note as a bonus.

Personally I want to try and get as much performance as reasonably possible without going FI, mainly because of the added stress and longevity of the engine. Plus, it's always fun getting new parts for the car to keep it "new" to me.

In actuality, if you have the money to spend and don't plan on racking up the miles, a supercharger kit is probably the best bang for the buck possible.

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Current Ride: 2012 Chevrolet Corvette Grand Sport Centennial Edition Carbon Flash 6M
Previous Ride: 2009 Nissan 370Z Sport Platinum Graphite 7AT