i have two turbotweak version 5.5(new version)by eric marshall for sale...heres the specs...first one is for 93 octane,009 injectors aka 42.5lb,steet timing @ 20degrees/18degrees,16-18psi boost................second one 110 octane,009 injectors aka 42.5lb, race timing @ 27degrees/25degrees,24-25 psi boost..it comes with the installation tuning dirrections..email me at tommynos@verizon.net with any fair offer for both or either..razor did my car today so i no longer need these..i also have a r93 red street chip that he said was a good one but i need to call for the specs..or make offer on it too and ill give you the # to them i didnt call them today like i was going to do.