Damn, while i encourage you to do this and i hope you get great results, i think your estimation of the hp you will get for each mod is innacurate. In the other forums i belong to we refer to this as "Ricer math". There is a law i learned in economics class called the law of diminishing returns. Whats going to happen is each mod you add on top of the previous mods will make it difficult to gain as much power as predicted. The car is getting closer to its max potential. Lets say a new air filter with the grill removed on a nearly maxed out engine will not yield as much power as on a stock engine(since its nearly maxed out). In other mords the more mods you add, the harder it will be to squeeze out extra HP. The needswings cutout will net 20-30 rwhp on a tuned srt-6 (best case scenario).Also remember its a supercharged car with more hp to being with. Your n/a might see half of that. Hope this helps and good luck