NC back box

  1. My model of MX-5 is: __2013 2.0 PRHT Sport tech
  2. I’m based near: __Bolton
  3. I’m looking for technical help or recommendations on: __Exhaust back box

Hi all,
I’m looking for recommendations on an exhaust back box but sound wise/drone wise not too different from standard.
I bought a Cobra Road back box used ( at least that is what I was lead to believe it was) and it was horrendous at 50mph in 6th !
I’ve seen a box on eBay by Gravity Performance and was wondering if anyone has installed one of those ?
Opinions appreciated

Have a read here

All I’ll say is Cobalt good, Malian extremely bad.

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I received a great recommendation while on a scenic car tours trip to Isle of Man, long story entry but what a chance! MX5 owners are a massive friendly knowledgeable resource.
anyway… check RPM - they’re based in Cullompton on the M5.
I drove down there in the morning with a smile in my stock and drove home the same day with a MASSIVE smile with a manifold to tip stainless replacement that sings such a sweet song.

Just for anyone else looking at Cobra back boxes, I think you may have been sold a race box, mines got the Cobra Road back box on and sounds great, louder but not annoying.

Hi talldave

I recently fitted a cobalt back box which I managed to get off marketplace second hand

Sounds deeper than stock quiet on a run with no drone