Originally Posted by C's Bimmer' post='747653' date='Dec 17 2008, 11:10 PM

Jon - Get RPI! I had Supersprint and Evosport :thumbsdown: . RPI rocks! My car is considerably quicker and stronger since going to all RPI. Their R&D is legit and the difference you'll notice is immediate. Plus, their cost of sale is much cheaper than everyone else. Why? Simple, you're not paying for their marketing costs that's built into their product (typical 30% increase). When you buy Eisenmann, you're paying for the name as well. RPI is pretty much all viral marketing at this point. I'm not sure how much longer this will last, as they are growing fast and word is spreading, but their systems are much more affordable than many others that are out there and their results speak for themself!

Go RPI!

/C