Originally Posted by xfirevan
I have to admit that I have a slight addiction to power. The Renntech kit is my list of things to do, but based on your description it's moved up a notch. I know someone that had a car custom built by Renntech and I have to say thier qaulity, service and a support is outstanding. They are also one of the top Mercedes tuners and have a close relationship with the factory especially since the founder is a former AMG employee.
For peace of mind and not wanting to risk damaging my motor, I would spend the extra money and go with a trusted brand like Renntech.
Based on the reading I've done, the numbers seem to be around 400 HP after the kit. I would really love to see dyno figures from a SRT-6 to back this up and not from an SLK 32.
I have a official Renntech tuner about a block from my office. Once I get my SRT I'll bring it by for a "consultation" and let everyone know what they say.
Saying that the difference is going from a non-SRT to an SRT with this upgrade says a lot!
Close relationship is right, I had check into Renntech stores before I bought my kit and I know of two MB AMG dealerships that have Renntech stores attached to them. When SI came on to the forum offering ECU's & pulley upgrades is when I bought my kit, I caught a lot of crap about how I wasted my money and I should have went with SI. I have no regrets and don't think I wasted my money. As for another post about springs & wider tire's, yes the Eibach's helped some on traction and I'm running 285/35's on the back now, I wish I'd have went even wider though.