Hi everyone. I have a 2004 525i with the 2.5 engine. I'm looking to pep it up a little. I was looking into remapping the ecu. Who does a good job on these 2.5 engines. I know they are not power houses but just want a little extra up. I have an m5 rear bumper with umnitza quad exhaust coming. So I'm thinking about getting an intake and a remap. Also would I benefit from a sprint booster if I get a remap? Thanks

 

Anyone?

 

get a sprintbooster and call it a day. the ecu remap/retune will not fetch you much.