[kBrazy]

Originally Posted by n55david

You're not going to notice a loss.. it's not like you'd lose 50hp etc

So is there a potential in losing or gaining?

[n55david]

Originally Posted by kBrazy

So is there a potential in losing or gaining?

Just put it on.. you're just waiting for one person to say it gains power for you to justify it..

[ZZO]

Originally Posted by kBrazy

Did you feel like you lost horsepower at all? I know some people were saying that. Any sound clips?

Originally Posted by n55david

You're not going to notice a loss.. it's not like you'd lose 50hp etc

I don’t imagine you’d lose HP at all, no? As it is a higher flow than a smaller Downpipe. Im sure you could get super technical with back pressure. But I have no idea of that.

I am comparable speed to the 2018 440xi Gran Coupe. I think I pull off faster as I have a staggered setup on XDrive, and he slips while I hook. Ill see if I can get a video uploaded to share here soon.

[n55david]

Originally Posted by ZZO

I don’t imagine you’d lose HP at all, no? As it is a higher flow than a smaller Downpipe. Im sure you could get super technical with back pressure. But I have no idea of that.

I am comparable speed to the 2018 440xi Gran Coupe. I think I pull off faster as I have a staggered setup on XDrive, and he slips while I hook. Ill see if I can get a video uploaded to share here soon.

The outlet on the 4.5" and 5" downpipes are the same size.. the transition on the 4.5 is better though.