Mate asking , He wants a more throaty sound from exhaust . has a 12reg xkr , askes my advice hence me asking the panel . Now the xpipe is a cheap way to get a more throaty noise from the exhaust but the xkr has 2 middle box resistors then the factory back box . What one needs to be done . front or back or both ?

 

Both .

 

PLUS pull fuse 19 behind the rear seat.

 

Beware, if you remove both the central muffler and the resonators you run a high risk of bad drone. That's what resonators are for, to cancel out the resonance which causes drone.
On my old XFR I removed just the central muffler and replaced it with an H-pipe (similar concept to an X-pipe) and left the resonators in place, zero drone with the stock rear mufflers yet a deeper exhaust note.
On the XFR the central muffler comes first after the cats then the resonators are downstream of that, I guess it would be the same on the XKR.

 

On the OTHER hand, dozens of members in the X150 (including myself) have done this exact X-pipe sans-resonators with OEM back box mod and it's fantastic. Zero drone and wonderful noises.
It's also the factory setup for the XKR-S, so there's that... Plus the X-Pipe with no resonators is required for doing an XKR-S tune on an XK/R. Actually any tune to be honest.

 

So just to be clear , around a foot from the cat cells their is the first Resonater box then about 2-3ft from that the second resonator box then another 3ft or so the back large box . So advice is to remove both resonates boxes and have 2 X pipes then the back large box , He don't want the extra noise to be intrusive.

 

Only need one X pipe. The picture is of my OEM performance active exhaust system that was an option from the factory on my 2012 XKR. No drone and both comfortable or brash regarding noise . Just depended if you run with the exhaust valves open or closed.

 

Thanks Jagtoes . Looking at your photo you have replaced the second of the resonater boxes with the Xpipe , Is that right ?

 

Jagtoes, looking at your photo it seems to me as from the Cats yours has then straight pies to the X box then pipes to the large rear box "muffler, were as on the normal xkr their seems to be 2 resistor sections that have to be converted into X box , so will tell mate to get them both changed to X box

 

The X pipe smoothes out the rough and rowdy sound of a cross plane V8.
I do not think a X Pipe would help get a "throaty" sound.

Instead I'd look at mufflers or/and cats.

 

X pipe should make it quieter, not throatier.

 

Well what should he do to get the more Rrrr sound ?

 

I'll try to explain it again. The picture you see is from the Jaguar Factory. I did not modify the system . It is OEM. The pipes from the Cat's are straight to the X pipe and then straight back to the rear back box. This is the OEM option PAE , PERFORMANCE ACTIVE EXHAUST that came on the car from the factory. You only need ONE X pipe . You can buy this pipe section from Jaguar. It has a Jaguar part number. It is not aftermarket.

 

My X-pipe gives a nice crackly-pop sound, almost like an F-Type, on downshift and over-run.

 

Got it . Found an old thread on this on here , way to go is to do same as yours , From cats straight pipe taking out first resistor , then install the xpipe in place of the second resistor , will advice my friend . Thanks guys

 

One other note, your XKR George has two, but the XK by default has one.
People who take the first box out on their XKR to put in an X pipe are making a much bigger modification than putting in an X-pipe on a XK.

If he wants something to really growl and roar and he doesn't live in a place with noise restrictions then replace the stock muffler box in the rear bumper with a setup that just connects to tips and forgets the box entirely.
That might be too much, but if he really wants it to kick, that would do it.

 

Thanks yeah i have read of that straight pipes job . he had the xkr-s tune last week so hopes this Mod will help with a few more Bhp

 

Why is your mate not on this forum and asking the questions himself?

 

The resonators are all in one piece. You take the whole section out and replace it with an x pipe.



These were the three options available:

 

One other possible option.
Find a back box from an XKR with a factory muffler bypass.
Manually lock the active muffler into the bypass mode.