Quote:
Originally Posted by Alx  Spark plugs are no biggie, try to stick with Kleemann for stage 1 upgrade.... They change the pulleys and upgrade the ECU with no red flags if you bring it to MB for service... 
I had it all done on my 2003 CL55...
Renntech would be my second choice.... |
I spoke to kleemann dealer today and the guy told me the ECU will give me from 20 to 25hp and in the website it written it give me from 8-10% so this will be 28 hp at least which one i have to believe.