Originally Posted by tashspop
nos is way out of the question. i'm not into tearing up a new motor. i'm guessing there are decent results from the si reprogram? by s/c do you mean supercharger? i'm guessing your talking about a custom build, because i haven't seen any kits available except that $14k one.
Do the SI thing first, its a bit expensive but hey, your getting another 20 whp, not a bad upgrade for $550 - $600. Then if possible I would install the srt6 exhaust, if cheaper have a muffler shop built one. Then buy the large intake system from the SL55 MBZ, (not sure if this is the correct model, do a search) it has larger intake volume and larger air filters. All together this should step you up a notch in the Hp area, maybe 35-40 hp, and a good boost in torque too. should run ya about $1,100 total.
Next I would start looking for bigger brakes, definatly the SRT6 set-up is the way to go. Then some braided lines, and grippy brake pads. DIY it for about $2,000 +/- $300.
The rest of you money should be spent on handling parts. AMG or SRT6 sway bars, coil overs, Rims, tires, etc...
After this you will have to do a custom S/C for the crossfire, but I heard a rumor on another thread here that an aftermarket company is in the works.
Oh yeah if its an automatic get the Sprint Booster $300.