Exact difference between XKR and XKRS Exhaust
#1
Exact difference between XKR and XKRS Exhaust
Yea, I searched.
So, if I'm right, the only difference between the two is that the XKRS has no resonators and has an x-pipe (H on the XKR). Is the muffler exactly he same as the XKR though?
Thanks.
So, if I'm right, the only difference between the two is that the XKRS has no resonators and has an x-pipe (H on the XKR). Is the muffler exactly he same as the XKR though?
Thanks.
Last edited by GGG; 08-27-2020 at 05:39 AM. Reason: Edit typo in thread title
#2
If the XKR came with the Performance Active Exhaust (PAE) then it has an X pipe not an H. I believe the XKR-S has the same system so the back box would be the same.
#3
#4
#6
XKR-S centre pipe
XKR-S rear muffler
The differences to the centre pipe are obvious.
The XKR-S rear muffler has larger diameter pipes coming out of it, larger valves, larger tips which are polished. Internally they are different as well, it's open inside with one of the pipes removed, the other pipes being larger than the standard XKR one.
The 5.0 XK, XKR and XKR-S centre pipes and rear mufflers are all interchangeable, same diameters, same fitment. You can put an XKR-S rear muffler on an XK, the XKR-S centre pipe bolts up to the standard XKR rear muffler, etc
XKR-S rear muffler
The differences to the centre pipe are obvious.
The XKR-S rear muffler has larger diameter pipes coming out of it, larger valves, larger tips which are polished. Internally they are different as well, it's open inside with one of the pipes removed, the other pipes being larger than the standard XKR one.
The 5.0 XK, XKR and XKR-S centre pipes and rear mufflers are all interchangeable, same diameters, same fitment. You can put an XKR-S rear muffler on an XK, the XKR-S centre pipe bolts up to the standard XKR rear muffler, etc
Last edited by Cambo; 11-17-2017 at 10:58 PM.
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#7
XKR-S centre pipe
Attachment 205755
XKR-S rear muffler
Attachment 205754
The differences to the centre pipe are obvious.
The XKR-S rear muffler has larger diameter pipes coming out of it, larger valves, larger tips which are polished. Internally they are different as well, it's open inside with one of the pipes removed, the other pipes being larger than the standard XKR one.
The 5.0 XK, XKR and XKR-S centre pipes and rear mufflers are all interchangeable, same diameters, same fitment. You can put an XKR-S rear muffler on an XK, the XKR-S centre pipe bolts up to the standard XKR rear muffler, etc
Attachment 205755
XKR-S rear muffler
Attachment 205754
The differences to the centre pipe are obvious.
The XKR-S rear muffler has larger diameter pipes coming out of it, larger valves, larger tips which are polished. Internally they are different as well, it's open inside with one of the pipes removed, the other pipes being larger than the standard XKR one.
The 5.0 XK, XKR and XKR-S centre pipes and rear mufflers are all interchangeable, same diameters, same fitment. You can put an XKR-S rear muffler on an XK, the XKR-S centre pipe bolts up to the standard XKR rear muffler, etc
too bad the muffler is different. my buddies xkrs sounds amazing, and so much better than my 5.0 xkr.
I will be doing the res delete and adding an x-pipe, but I think that a lot of the sound difference will still be in the muffler, unfortunately.
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#8
#9
The following 2 users liked this post by Cambo:
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#10
#11
I've not physically checked it myself, but a friend of mine put a borescope down the pipes of an XKR-S muffler, and he tells me that the U-pipe sections are not there.
The pipes marked in red.
Attachment 205764
Not sure exactly why it would be done that way, but that's what he tells me.
The pipes marked in red.
Attachment 205764
Not sure exactly why it would be done that way, but that's what he tells me.
Just did a quick search and found that there is a different part number for a 2012 XKR and XKR-S back box. C2P24867 for XKR and C2P24865 for the XKR-S. Also the price is different with $1700 for the R and $3800 for the R-S
Last edited by jagtoes; 11-18-2017 at 07:07 AM. Reason: more info
#12
#13
With that said, this is my plan....to add an x-pipe and delete both of the small center resonators/mufflers, and keep the stock rear muffler. I think that should give me a much improved sound, but not add in any drone, as the stock rear-muffler will be in place. Thoughts?
#14
Now you know, but I knew this for a long time already...
Keeping the stock XKR rear muffler and keep the active exhaust operating (don't pull the fuse) it's absolutely dead quiet while cruising, no drone, until you put your foot into it and then it screams.
For example with my XKR, I have 400 cell cats, straight through centre pipes with x-pipe (more or less the same as the XKR-S) and the stock XKR rear muffler, with the active exhaust still functional. It's a total Jekyl & Hyde between cruising and wide open throttle.
Keeping the stock XKR rear muffler and keep the active exhaust operating (don't pull the fuse) it's absolutely dead quiet while cruising, no drone, until you put your foot into it and then it screams.
For example with my XKR, I have 400 cell cats, straight through centre pipes with x-pipe (more or less the same as the XKR-S) and the stock XKR rear muffler, with the active exhaust still functional. It's a total Jekyl & Hyde between cruising and wide open throttle.
#15
Now you know, but I knew this for a long time already...
Keeping the stock XKR rear muffler and keep the active exhaust operating (don't pull the fuse) it's absolutely dead quiet while cruising, no drone, until you put your foot into it and then it screams.
For example with my XKR, I have 400 cell cats, straight through centre pipes with x-pipe (more or less the same as the XKR-S) and the stock XKR rear muffler, with the active exhaust still functional. It's a total Jekyl & Hyde between cruising and wide open throttle.
Keeping the stock XKR rear muffler and keep the active exhaust operating (don't pull the fuse) it's absolutely dead quiet while cruising, no drone, until you put your foot into it and then it screams.
For example with my XKR, I have 400 cell cats, straight through centre pipes with x-pipe (more or less the same as the XKR-S) and the stock XKR rear muffler, with the active exhaust still functional. It's a total Jekyl & Hyde between cruising and wide open throttle.
am I right in thinking that the first "can" after the cats is a resonator, and the second one is more of a muffler?
#16
That I couldn't tell you, I haven't seen inside the two cans on the centre pipe.
Some people have put the XK centre pipe on an XKR, and reported an improvement in the sound, there's a thread here in the forum "XK exhaust on XKR is win" or something like that. The XK centre pipe only has the rear can on it.
My friend dropped off the XKR-S pipe last night, here you can see it with my stock 4.2L XKR centre pipe.
I don't have a regular 5.0L centre pipe here to compare it with.
Some people have put the XK centre pipe on an XKR, and reported an improvement in the sound, there's a thread here in the forum "XK exhaust on XKR is win" or something like that. The XK centre pipe only has the rear can on it.
My friend dropped off the XKR-S pipe last night, here you can see it with my stock 4.2L XKR centre pipe.
I don't have a regular 5.0L centre pipe here to compare it with.
#17
#18
That I couldn't tell you, I haven't seen inside the two cans on the centre pipe.
Some people have put the XK centre pipe on an XKR, and reported an improvement in the sound, there's a thread here in the forum "XK exhaust on XKR is win" or something like that. The XK centre pipe only has the rear can on it.
My friend dropped off the XKR-S pipe last night, here you can see it with my stock 4.2L XKR centre pipe.
Attachment 205908
I don't have a regular 5.0L centre pipe here to compare it with.
Some people have put the XK centre pipe on an XKR, and reported an improvement in the sound, there's a thread here in the forum "XK exhaust on XKR is win" or something like that. The XK centre pipe only has the rear can on it.
My friend dropped off the XKR-S pipe last night, here you can see it with my stock 4.2L XKR centre pipe.
Attachment 205908
I don't have a regular 5.0L centre pipe here to compare it with.
my 5.0 2nd can (closest to the rear axle) looks much different than both on the 4.2. my first can by the cats looks exactly like the 4.2 first can.
#19
so would those be doing more muffling of overall DB, or toning down something else like resonance?
#20
I would assume their function is to do both. Has anyone deleted them and run straight pipes (no X ) to the back box and if so what results did they have with noise and resonance/drone.