I just acquired a 2015 XKR. Upon crawling under the car, I discovered that the exhaust system is the xkrs style with an x pipe and no resonators. I do have 20 inch rims as well. The thing is: I don't seem to have the other things that would be in the speed pack. No diffuser, no upgraded spoiler. So the question is, did the performance active exhaust come as a separate option or only in the speedpak? The other possibility is someone put the muffler system on and the 20 inch wheels. Thoughts?

 

Pretty sure the PAE was available as a separate option, and I suspect most R’s came equipped with 20” wheels.

 

Good point, Occam's razor and all of that. Simplest explanation is that it was an separate option. The rims are red herring, as the car clearly doesn't have any of the coachwork of the speed pack. Thanks!

 

One way to tell what size wheels were originally equipped on the car: Look at the tire pressure placard on the driver’s door. It specifies the pressure for the displayed tire size, which is what the car had when shipped from the factory.