Member, Sport: Off DSC: On (>50 posts)
Join Date: Aug 2010
Location: Richmond Va.
Thanked 1 Time in 1 Post
Headers are installed picked the up last week. I wanted to drive it a while to get a feel of the car. Slight change in the tone of the exhaust sharper is how I would describe it just a little more rasp out side no real change inside. Put abut 120 miles on it over the weekend. With miles the tone begin to change a little smoother closer to stock. Performance got better the more I drove it better response to the throttle in aii modes.
Took the car to frank smith to have a custom dyno tune on Tues. Frank tells me that a strong m5 puts down 380 to 390 on his dyno mine put down 411. After the tune the car kept getting stronger 430,433,437,440.