the slp kit and exhaust are a good start as RrCox stated. With only these mods you will not HAVE TO HAVE a dyno tune. You can buy a Programmer to adjust for these mods. the Dynotune will of course be better, but that will cost you between $450-600 depending on who you go to. With only these mods, I do not think it would be cost effective to get a dynotune. but that is MY opinion. A Diablo Sport Programmer will be great, and they double as a Data Logger, which could be useful in the future. HOWEVER, lol, if you can hold out and just get a dynotune if you plan on upgrading the intake or heads, then you may want to wait for those. lol.
True Duals are available in 3", if you are goin to dump the exhaust at the axle, i'd go with 3". If you are wanting to run the exhaust Over the Axle and out the back, then 2.5" will be needed, unless you relocate your pan hard bar. Texas Speed sales a True Dual set up. I have this set up under my car with pacesetter headers. Ground clearance is fine for Daily Driving. Somewhere around 4" of clearance i'd guess. If your car is lowered, people say they have problems is bumps and such. I just lowered my front 1.5" on my car and have not had any issues with scraping, yet. the True Dual exhaust will not hang any lower than what an Off Road Y-Pipe will. As far as headers..... Kooks are some of the best, but expensive. Texas Speed offers a set of headers that are Very Similiar to the Kooks. Pacesetters and Stainlessworks are also good headers.
that SLP kit, supplys air from under your front bumper, via the steel ducting that comes in kit. It requires that you cut a hole directly under the filter. People seem to like these kits. If you do not have an SS hood and lower box, then this kit should help you.
Hope this info helps
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