Hello,
If you want to "gain some horsepower", transformations will have to be made on parts of the engine. It's the engine that is responsible to generate Kilowatts. So it's her, or her direct compenents you will have to tune.
Lowering your car, putting spoilers or rims, etc, will not generate any increase of power.
Please also ask yourself WHY you want to fiddle on the engine of a +460Hp car that is reaching acceleration times and peformance of not-so-old Ferrari cars.

 

You could add some fire decals on the side & a hoonigan sticker on the rear, that should be good for about 35-40 horsepower.

 

 

I would recommend an aftermarket exhaust system given that the stock system is VERY restrictive. Great budget options are catback exhausts like invidia and borla or more pricey/louder options like meistershaft or armytrix. CAI is not needed as stock setup is great unless you want to change the look for which just intake pipes such as lems ti, rr racing carbon fiber or hps silicone tubes are great options. Good luck!

 

RCF stock exhaust is like a straw. Just over 1.5 inches for a big 5.0 Liter with a nasty 90 degree turn just before the mufflers, is comical. Adding a 2.5 or 2.75 inch catback exhaust will net another 20 - 25 whp on the average. It could be a bit higher or lower as the general range is 18 - 29 whp depending on the setup. That is around 35 HP at crank.

 

I wouldn't consider an intake a waste. It a basic mod that complements intake and a header. Intake is a mod that can and will increase power with a tune. Exhaust will free up power lost in poor exhaust design. I've posted dyno results showing gains with an intake. Some people don't seem to think an intake is needed but basic understanding of engine combustion should indicate the benefit. Keep in mind that manufacturers often sacrifice performance to meet emissions requirements.

 

 

 

 

 

 

Nah dude that's definitely over 50!

Forreal though, as others have said, exhaust is definitely the best way. Depending on how loud you want the car to be, you have a couple options. Just keep in mind if you're doing a full system - cat back including headers, the car will be pretty loud. It's the reason why I plan on going with a quieter exhaust + headers.

 

 

^^^^Rather than posting over and over again, and asking questions that some members thought as silly (hense the answers that offended you) why not use the excellent search function on this forum?

Lou