MX5 mk1 zorst

[CER927]

After some advice, the sports twin and single exit exhausts, are they too loud for track days? What DB's and which makes to avoid or choose. Thanks in advance.

[pete]

I can't comment on the track day angle, but I put an MX5 parts single exit stainless exhaust on our mk1 1.8, and it's a lovely bit of kit. Fitting was a doddle (ish -on axle stands!), and it has a lovely raspy sound, but not too loud. Certainly louder than standard, but then it omits the central resonator/silencer box. I'm sure it would be fine on most track days, especially with the cat still in place. They have frequent special offers; I ended up paying something like £180 including new rubber mounts and copper nuts for the catalytic converter, which is a steal considering the quality.

[MX-5 Lazza]

No MX5 will fail a db test just from having a sport back box. Even if you removed all the baffles from the box it would likely be fine. Mine with a 2.5" Sport cat & mid-pipe (Larini) and 3" dual exit rear box (Racing Beat) never got anywhere near any limits, something like 93db.

[J-Tuner]

My last day at bedford i was at 89db, thats superchraged with a cat in and the cobalt backbox and mid-pipe. Flew through. He even took the mick and said i needed to try harder

A standard v8 m3 is 89db for comparison.

[JoeyD]

I used to have an IL motorsports 4-2-1 manifold, silenced decat and IL Motorsports cat-back on my 1.8 MK1. Did Oulton Park (105db) a few times with no issues whatsoever. They never gave me an actual figure though annoyingly.

[CER927]

Thanks for the replies, the twin tail rear box on the car is extremely noisy, the packing must be missing. So I think I'll replace it with the colbalt twin tail system then. I think the existing system is fubar. Getting it ready for a track day at Brands on Friday, roll on spring!