W166 Turbo upgrade? - Renntech vs Weistec
What do you guys think, which one would you choose?
Any direct experience with one of these tuners ?

http://www.renntechmercedes.com/www/node/1130
http://www.weistec.com/m157turboupgrade.html
Please note that the HP numbers of Wesitec are WHP



I Will go to Renntech when i buy a 63 in Daytona



