xk8 exhaust mods

[400+bhp]

can the existing box (s) be modified as my tvr was easy job or do we get a sports box and fit it want a real nice rumble without any emmision issues thanks all any one got one to sell !!!!

[adu]

A nice easy exhaust mod which gives a bit more growl is to change the back boxes for straight through stainless pipes,
around 200 gbp the pair complete with nice tail pipes from Adamesh, XKZahran or JEC ,

>>andy

[400+bhp]

adu said:

A nice easy exhaust mod which gives a bit more growl is to change the back boxes for straight through stainless pipes,
around 200 gbp the pair complete with nice tail pipes from Adamesh, XKZahran or JEC ,

>>andy

so are you saying loose the rear box or are they still boxes but with thru pipes within does this effect mot thanks again

[NormanD]

400+bhp said:

so are you saying loose the rear box or are they still boxes but with thru pipes within does this effect mot thanks again

Many have done that, no problems

[adu]

Yes 400 loose the rear boxes and replace them with these



No MOT problems

>>andy

[400+bhp]

adu said:

Yes 400 loose the rear boxes and replace them with these



No MOT problems

>>andy

looks good to me you suggest a few companies we on south coast will call a couple and get idea if they ship etc thanks

[Triple7]

Racing Green of Ash Vale do a fab exhaust for the XK, but it pricey, others like Paramount Performance.........

[nickco201]

Anyone have a sound clip ?

[Psychlist]

I've got the JEC exhaust on mine, got a great deal from Adamesh on it too. I find it gives a bit of resonance about 2000 revs but it's worth it for that extra little growl on the kickdown

[cjrm1]

I have a Quicksilver exhaust, replaces the system back from the cats and you lose the rear boxes.
Ask Arun in Chicester as I think they can supply and fit.
Several people commented at the XK8 seminar at the Jag factory last december how good is sounded.

[robocop]

400, there are now lots of aftermarket exhausts for the XK. Check out this topic whichhas some more info

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Rgds
Robo

[designXKR]

We supply QuickSilver, Blue Flame, Adamesh and of course Arden systems.

Give us a call on 01264 3335223 or on 0770 4321556 for prices.

[Evoluzione R]

I bought that system from Adamesh: just delivered, tomorrow I will give my XKR to mount it and I'll tell You how it works (hope fine!).

[nev996]

HAD SAME QUESTION MYSELF AND ADU GAVE ME THE ADVICE. HAD ALREADY HAD A STAINLESS SYSTEM MADE FOR MY CHEROKEE AND WENT BACK TO THIS LOCAL COMPANY IN BRUM AN TOLD THEM WHAT I WANTED. THEY MADE IDENTICAL PIPES AS THE PICS ADU SENT YOU AND THEY FITTED THEM AS WELL ALL FOR 200 QUID SO I WAS REAL HAPPY AND A LIFETIME GUARANTEE TO BOOT. MANY LOCAL GARAGES NOW MAKE STAINLESS EXHAUSTS AND AS LONG AS THEY USE GOOD QUALITY STAINLESS AND BRACKETS YOU SHOULDNT HAV ANY PROBS AND I WOULD THINK AS THEY ARE ONLY PIPES WITH NO SILENCER INSIDE THEY WILL ALL SOUND THE SAME WHOEVER MAKES THEM. I AM REALLY PLEASED WITH THE GROWL THEY MAKE AS I FIND ITS NOT TOO INTRUSIVE IN THE CAR AND WHEN YOU DO HAV WINDOWS DOWN THEN YOU GET THE BENEFIT OF THEM AND THEY DONT CAUSE ANY PROBS AT MOT TIME AS YOU STILL HAV THE CATS AND 3 SILENCERS. IF I WANT ANY MORE NOISE THEN I WILL JUST TAKE THE NXT 2 BOXES AWAY BUT FOR NOW AM MORE THAN HAPPY. GOOD LUCK

[adu]

Glad to see you got sorted Nev

>>andy

[ajmac]

Why is it that the new XK with a performance exhaust sounds SO much different from an older XK8? The Latest Xks sound wonderful, much deeper and less raspy than the modified XK8s that I have seen, is it due to the large back box that they have?

Edited by ajmac on Wednesday 2nd September 20:03

[Evoluzione R]

It's already 10 days I have the new exhaust (from Adamesh) and I'm very glad for that. The sound is louder (but not too much) and incredibly nice.

[Marquis_Rex]

ajmac said:

Why is it that the new XK with a performance exhaust sounds SO much different from an older XK8? The Latest Xks sound wonderful, much deeper and less raspy than the modified XK8s that I have seen, is it due to the large back box that they have?

Edited by ajmac on Wednesday 2nd September 20:03

I was involved in the preliminary development of the X150 in terms of sound quality design.

It's not as simple as saying it's because it uses a larger back box. NVH really is an analytical science.
As a general rule-If you want to attentuate lower deep frequencies you a 3 pass or 2 pass silencer. Failing that- you use silencers with alot of perforations within that act as expansions. If you want to target higher frequncies-for a more 'woofly' sound you use more straight through silencing- and vary the amount of wadding.

[RW774]

Interesting Marquis, what about the headers ?, to me they seem an after thought compared to what you have for your old Yank 8s. I accept under bonnet temperature would be a problem, but surely the cast manifolds dampen the Jaguar power and ruin the torque potential no matter what fancy exhaust is fitted.
Have the US engineers designed a damper that works yet...? yet?

[Marquis_Rex]

RW774 said:

Interesting Marquis, what about the headers ?, to me they seem an after thought compared to what you have for your old Yank 8s. I accept under bonnet temperature would be a problem, but surely the cast manifolds dampen the Jaguar power and ruin the torque potential no matter what fancy exhaust is fitted.
Have the US engineers designed a damper that works yet...? yet?

With the cast iron manifolds you lose mainly low speed torque. I've tested AJV8s with tubular length manifolding. It makes a big difference to low speed torque. The cast iron logs are a concession to rapid catalyst light off for emissions.

The AJ37/AM5 Aston martin engine (a development of the Jag engine I was involved in) has a reasonable tubular manifold compromise. If i ever buy an XJR- I know EXACTLY what I WILL do to it to make it a scorcher!

Yeah- American cars can be under damped- although BMW and Merc drivers say the same about Jags. It's a matter of choice I suppose.