Not if you do it all at once I will have my car stored for the winter so im going with the ASP pulley, VRP air box, and possible the SI or Veloce tune which ecu alone has shown higher gains then renntech and evo.
www.VelocePerformance.com they were just having a 15% off sale so rough cost of $900 dollars but if we could get a group buy going we could all get the best tune for cheap pricing...

I missed typed that as well all the results I have read have been after people have had the ecu tuned BUT the air box yields 15-20 horse alone with the complete kit. Sorry for the confusion it is the same as the RENN-TECH box for $2,500 less here is what it looks like with the tubes...