- My model of MX-5 is: __Mk.3.5 2.0L Sport
- I’m based near: __Hull
- I’m looking for technical help or recommendations on: __Stainless back box
Anyone using a gravity performance back box?
What is it like for noise etc?
For £249 it’s worth a punt mate
I have one on my 2006 sport
Louder than stock but not silly.
No motorway drone.
If you watch out for their sales - it can be had for £179
EDIT - buy it through ebay and use code SHINE15 - you will only pay £212.49 and free delivery.
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Bit more noise but no drone? That sounds good. I’ve an ILMotorsport with much the same attributes I paid much the same for. I’d have been gutted if I’d bought it new for over six hundred quid….
Thanks mate….Any chance of a video of it so I can hear it?
I can’t help on the video front, but I was behind Dean’s car for about 30 mins on a Club run the other month and it sounded good! 
As said, a bit louder than stock and a slightly deeper tone. I’d be happy with one on an NC certainly.
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Don’t have a video but I do have neighbours who seem to think they are the noise police.
They hate my motorbike even though it has a fully E marked exhaust on it.
So far there hasn’t been one squeek about the MX5 exhaust.
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Got one fitted to my NC, can’t say I’ve noticed any real difference in the sound during normal driving although I suspect that’ll change when I get round to fitting the gravity performance de-cat pipe I’ve got sitting in the garage. It also looks nicer than the stock backbox.
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They have just given up on you!
Trouble is the car starts on a digital choke set at 2k in my case.
Cheers mate 
I started watching it last night and they sent me an offer
Bought using code for Order total
£201.87
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Noticed there was a video and a little review on another thread for the NC here:
Looks like you’ve already found that @easyrider - but for anyone else searching on this, later down the line
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There is a serious point here. The high profile exhausts are now over £600. There is now something at £200ish that may produce the same preformance at a third of the price. It’s probably not as well made and may not last as long.but, if it produces the same result but for a shorter length of time that makes it a player?
I got a il Motorsport exhaust recently for beans. It’s beautifully produced and is worth the £600 retail price but it’s a lot heavier than the stock item and if I was buying new it would be tempting to take a punt at what is a third of the price?
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Well that’s what I did…buy a stock one from MX5 city for £140 or spend 60 more on a stainless
I hope that works out. My NC already gets grief for being bloated. Adding a heavier than OEM exhaust is just adding fuel to the flames!
Out of interest was this a replacement for the original standard exhaust? It looks the same and is an excellent price. I’m not disappointed by the original silencer on my NC. I’ve got a posh IlMotorsport jobby that I swap out every now and again. I like it but it’s a bit noisy. Swapping between the two exhausts is easy so it’s quite a nice thing to do every now and again without spending more money😀
The Gravity box feels about the same weight at the std one ( not measured - just by feel when swapping )
Noise wise - I would class it as stock+
It is deeper than stock but not much louder - and you can hardly tell the difference on the motorway.
You notice it a little more with the top down and enjoying a good A/B road.
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The ILMotorsport is noticeably heavier but very well constructed. I don’t think it makes any difference on the road . I have swapped between the two thrice now and it’s just more ( quite nice) noise rather than more performance.
If you like a nice looking rear-end, it’s quite an improvement on the standard.
Hi all
Was just about to ask about a back box myself, MX5 parts have their’s back in stock, are these worth a go, bit more expensive than gravity performance but are they any better ?.
I’m not sure but the wording suggests it could be a new line so no reviews?
Fwiw.
I also have the IL motorsports backbox & pretty much mirror @Beryl experience with it. It is VERY well made & definitely the slashed tips fit perfectly into the rear looks much better almost how OE should have been, to my eye at least.
The only thing to add is that I am also running a catless manifold & I very much like the deeper tone & associated burbles but that DOES make it a fair bit louder, especially with the roof down. I get a little bit of resonance at about 2.8k revs but apart from that very happy with it.