Eracer 76: Sounds great...I agree with feets...some kind of baseline for measuring the performance before and after would be a good idea...be it a Dyno or quarter mile time...although the variables at the track can be problematic when making comparisons. A before and after Dyno on the same machine would really be informative and let you know if you really got your money's worth. I wonder why there is a $500 difference between the prices since it is the same engine...paying for the Mercedes name perhaps. I sent RENNtech an e-mail asking questions about their performance package to include a question regarding the 19 HP difference between the SRT-6 and the SLK32 AMG...
Keep us posted as you move forward...thanks.