Are there any 550i owners on here that have RDSport headers?

 

I think it was member rpav who has RDSport headers but on a 545

 

I guess I was just wanting to know what the gains were. I heard that they give around 25 hp for the 545/550. If this is the case, then I was going to do only this mod since they are so expensive at around $3500. My only concern would be if the interior of the car got hot and what kind of exhaust sound I could expect.

Hey rpav, any info would be greatly appreciated.