Originally Posted by BiTurboAmg

Vadim we have logged his car before. His iats are low and never go over 134 and go as low as 109 if I recall. We also checked to see if he had any pending codes before the dyno and he had nothing. Can you tell me if the evo headers make less or more power then the kleemann headers? What about the vrp airbox does any one know if there is any gain to the wheels with it? My car made 455whp and 525lbft on the same dyno with the k2. I also do not know if his ecu was tuned for headers or if that makes a difference. I dont even think that much power can be lost from the dealer flashing the ecu. His car is about 20whp and 25lbft less then my k2 car. I did have the kleemann down pipes though and he has the cats in place.

Originally Posted by Vadim@GMGRacing

Here is the graph:


Killer: Check following:

1. Air filters - make sure they are no plugged up and properly installed
2. See if you can find a 100 Octane gas and mix about half/half with 91.
3. Check error codes - any auto part store sells OBDII scanners, some even offer free service.

Start from here.

P.S. See if you can still get raw data from the shop.