I've just installed a new Akrapovic slip on exhaust and have about 5,000 miles. For all those miles the header pipes have been a perfect golden brown, running about 184 degrees stock. With the new slip on the pipe(s) turned bright purple in about 50 miles. This I know is a flow/back pressure problem. Or an issue with the fuel management system. I've just ordered (not installed yet) a Terry Components Terminal Velocity 3 fuel management system (closed loop). FYI I did remove the db pipes and the header temps were the same with or without! Has anybody run/heard of the same issue? I don't care about the color of the pipes as much as being worried about the exhaust valves!