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I've been pleasantly surprised by the Spires exhausts I've recently fitted to my car. They are much louder than I expected, but not too loud inside the car.

First video is a quick blast, under load. Very noticeable.


Second video of my pulling away from a standing start. You don't really get a feel for the noise in this one though.

 

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Discussion Starter #2
Am I the only person surprised by this then?


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The only time I notice my Spires exhaust is when the car's doing a DPF regen. It actually makes a decent echo in the multi-storey!
 

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Really? So unless mine is doing a regen all the time, something could be up.
 

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No, yours are absolutely fine Chris. The difference in noise/tone is just too subtle for Nick and is something he is yet to pick up on :) I have discussed this with him on several occasions. You will certainly know when the Spires are doing a regen. Let it idle for a minute or so until the EGR valve kicks in, that's about half volume!
 

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Discussion Starter #6
Thanks Jerry. I've certainly noticed the EGR valve opening and noise difference.


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Really? So unless mine is doing a regen all the time, something could be up.
15 years in clothing manufacture has impaired my hearing range somewhat.
 

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Pardon?! :D
 

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Hallo Dandy
 

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Bjorn Borg
 

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Discussion Starter #12
Who? ;)


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Discussion Starter #13

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Anyone interested in hearing a Spires exhaust (while visiting Castle Donington today), just ask!
 

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Why would you want to make a diesel louder? I took the valves out of some XFR boxes and on my 3.0d they were louder but only at a certain RPM and tickover which annoyed me.
 

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Adam, that wasn't my intention at all. In fact before I had even bought these and after speaking with other members who have diesels with these exhausts, I was under the impression they made no difference to the sound at all, much like the standard XFR silencers.

But I quite like the sound when driving to be honest. It doesn't really sound like a diesel IMO.


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My Spires Quad exhaust system was the one designed and built specifically for the 3.0 Diesel engine and it sounded different (better) than the standard OEM part. Very difficult to describe but it just sounded sweeter, a bit more refined and a bit more throaty, less of a raw diesel engine sound. It wasn't any louder than the OEM system apart from when the EGR valve opened/closed (whichever way round it is) after about a minutes idle or during the DPF regen. Then it was noticeably louder than the original Jaguar system.
 

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Discussion Starter #18
That's the exact experience I'm getting Jerry.


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I found the other benefits of the system were; it transformed the looks (along with the addition of the two piece rear valance and XFR diffuser), it saves on weight, it is so well made it will easily outlast the vehicle and you can get a most of your outlay back if selling it on privately and putting the OEM system back on the car (10 minute job).
 

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Discussion Starter #20
Yep all good points too. I only bought them for the look with the XFR-S diffuser. The sound change is an added benefit.


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