Xpower Back Boxes - Buy, or Swap for my Zero Loud Quads (Saloon)

Any condition Xpower back boxes sought - Saloon or Tourer.

Will swap/negotiate for my Zero Loud Quads, in immaculate condition.

£350 for the Zero?s, but happy to add money for some Xpowers.

PM please, if you can help.

Hi,

I'm interested in your Zeros, but sadly have no XPowers to offer!

But I'm puzzled by the Zero "Loud Quads" description. I've read what I can find on the forum and listened on YouTube about the various exhausts and thought I had it all sorted, and my assumption was the Zero quads were quieter than the (earlier?) Zero ovals and the Xpowers (also ovals).

I want some quads louder than the standard, but still keeping within trackday limits (usually 105dB). I measured some Tony Banks quads on a friends 260 yesterday (Tony must be taking some time off playing keyboards for Genesis) and they were 92dB @ 4000rpm (with nothing clever, just an iPhone app). I'd say they were where I thought the Zero quads would be in terms of loudness.

Have I got the hierarchy of loudness wrong? I generally thought it was:

Standard
Zero Quads
Zero Ovals
XPower Ovals
Straight throughs!

Thanks!

You know, I?m not sure if ?Loud Quads? are a thing.. chap I bought my car from I believe bought them new, & he described them as such. They are definitely louder than standard and sound lovely, but not as aggressive to my ear as Xpowers. Would easily pass track day limits I would think, as in the past I?ve had no issue on various tracks running Xpowers. You can I think still buy new from Zero, so maybe give them a call.

There's that and there's the difference between Tourer and saloon cars. Tourers are louder to the driver because the large boot space sitting above the backboxes acts as an amplifier.

So a saloon with identical backboxes will be quieter than a Tourer.

I used the X-powers for about a year on my Tourer but found them too loud for comfortable daily driving, mainly due to their 'drone' between 1900 and 2100 RPM, typically where the car is comfortable cruising on all that torque.

Age is also a factor. I've found that my standard exhausts - now with 242'000 km and 19 years of age - are getting 'droney' around the 1900-2100 RPM mark.

EDIT:

It would be interesting to fit louder backboxes to a R75. The whole exhaust has extra soundproofing (an additional silencer mid-way I believe) so 'loud' backboxes could be a good compromise.

A couple of the cars I test drove before I bought mine had non standard exhausts, for 20 mins or maybe an hour they were fun but I can't imagine what it would be like after 8 hours on the motorway.

I don't find my XPowers at all droney, with or without tubes in
the trip down to Croatia and back through the mountains saw 8-10 hour driving days with the tubes in all the way - pure heaven :) :)