I was just wondering as it's cold here with a lot of snow laying around and more expected tomorrow , the difference of exhaust sound.Does the XKR with the performance exhaust option sound any different then the XKR-S exhaust. Does the 40 more HP make a difference in the sound. Has anyone made a comparison. Just wondering.

 

The Performance Active Exhaust was an option on the XKR and standard on the 75, R-S and Dynamic R. Same exhaust, with a centre crossover rather than two silencers, and the same sound.

 

The guys from my dealership think that the R-S sounds slightly different to my R with the X pipe. I think the R-S has different finishers in the pipes. They said it is almost the same, the R-S is just a bit better.

I dont know whether the 40hp has anything to do with that, but I doubt it because the bore is the same, the 40hp is just from the ECU.

 

Yes I understand the difference from the active vs the standard. I was wondering if the active on the XKR sounds the same as the XKR-S exhaust being they are the same.

 

The ******* is always going to say the RS sounds better....

 

Same engine, same pipes, and I haven't heard anyone mention a difference. The HP gain is mostly in fuel mapping; there's some from the exhaust, but Jag won't say how much (i.e. I believe an XKR with the PAE has a few more HP than one with the standard active exhaust), and it will be the same on any car with the PAE. Individual cars will sound different anyway; they all have slightly different exhaust joints & mountings, and different carbon deposits in the pipes, so the resonant frequencies will be different.

 

What I find strange is that in any videos I've seen where a 5.0 (XKR/XFR) has had the resonators/secondary cats removed and an aftermarket x-pipe put in, it doesn't really sound like the XKR-S/performance exhaust.


An x-pipe doesn't really seem to make the standard exhaust any louder, it just takes on a different tone; more of a howl than a muscle car type burble with crackling etc.


But to me the XKR-S sounds like a standard XKR with the volume turned up slightly. That leads me to think there must be a difference somewhere.

 

Maybe the precise positioning and configuration if the crossover makes a difference to the resonant frequencies and thus the sound. I expect Jag spent quite a bit of time/money getting it the way they wanted it.

 

Hmmm, I think you will find that the x-pipe makes it much louder. But I agree it changes it to a howl, I quite missed the throb sound which I expect the resonators put into it by...ummmm...resonating?

 

I have a friend with a 2014 XKR with the PAE and my 2013 XKR-S.

indeed we have not noticed a difference.

Loth

 

I cannot attest to any sound difference but for my 2012 model year each exhaust does have a DIFFERENT part number and cost.

XKR: C2P24867 ~$1800
XKR-S: C2P24865 ~$3700

I wonder what the difference really is?

 

It could be that your XKR has the standard vs the performance exhaust. Do you have the X pipe?

 

Not my experience - I had a Spires crossover pipe fitted to replace the silenced/resonated center section on my 4.2 XKR and it's between 20 and 30% louder I'd say. The tone does change as well a bit more aggressive and sporty but volume definitely increased too.

 

The question was "does the XKR Performance Active exhaust sound any different than the XKR-S exhaust?" I cannot answer that because, yes, I have the "standard exhaust". I was hoping to add some insight and part number information to clear up the differences between Active exhaust and Performance Active (also know as the XKR-S exhaust).

My XKR 5.0L car was built with the standard Active exhaust. I did add the cross pipe in an attempt to replicate the sound of the Performance Active (XKR-S) exhaust. The cross pipe alone did change the sound but failed to replicate the Performance Active exhaust sound. I suspect the X-pipe alone is not the total solution, the entire rear "muffler" has something to do with the sound. I support my hypothesis with the fact the Jaguar list different part numbers (see my post above) and significantly different pricing between the XKR (Active) and XKR-S (Performance Active) exhaust.

So Jagtoes, the sound your car make should be pretty close to the XKR-S...it has the same exhaust. The S makes 40HP more than the XKR and your Performance exhaust is reported to add 10HP. This only puts you 30HP away in terms of power. How much does that affect sound, I don't know but I think Loth does. He has made a direct comparison and thinks they sound the same. I'm just trying to make sense of it all and get that Performance Active sound you have!