AMG__POWER

Hey guys I'm picking up a 2002 e55 AMG this weekend. 175k miles new transmission and I would do an engine rebuild. Only $4500 my question is while I'm doing the rebuild I would like to get my mods out the way as well. I was thinking going with EC headers and tune as I have these on my 211 e55 and they are great. Also I was thinking of going secondary cat and resonator delete with X pipe. With all these mods what would I be pushing power wise? It is my DD car