Below are a couple links. The first is a link to Club Lexus forum for recent mods done to my car by JP Importz in Dallas, TX. I had TEIN CS coilovers installed as well as S&S headers, Borla mufflers, and a custom built 2.25" exhaust. The performance increase is noticeable in both handling and performance. If anyone is interested in these mods, I'm glad to answer any questions and share my opinions on the various mods. The other mod I have is the SRT intake. Below are also exhaust clips of my car.
Club Lexus thread on my car
Exhaust clip1
Exhaust clip2