Hi SPWD- I ummed and arred about this too but had it done in the end and all I can see are gains not negatives. Unknowingly I had a cheap after market DP on mine when it went to R-tech for a stage 1 and it hindered the power before and after the re-map. Since then I had the cam chain tensioner done, pick up pipe service, sump off and cleaned, millers nanodrive oil and while they were at it, got AKS to fit an oem DP with the pre cat deleted. All of these things have really sorted the old girl out and I can feel a real difference now. The car used to lurch a bit on pull away but that is now remedied and when you give it the beans the car is more responsive. It isn't really any louder as such but you get a nice burble if you blip the throttle. I'd get it done mate! Cheers, Ollie.