Roush axle back on track

[JohnnyFive]

Picked up my 67 plate GT two weeks ago and absolutely love it, apart from the noise. I've been somewhat spoilt by my last car (V8 Vantage with prodrive cats) and the Mustang is really lacking in the noise department right now.

Has anyone fitted the Roush axle back to their S550 and used it on track?

I love the sound of it but need it to pass noise limits for track days, the Aston wouldn't without the bypass permanently closed.

Ideally I'd got for the active exhaust, but at five times the price, it is sort of hard to justify!

[JohnnyFive]

Waaaaaay too loud.

Noise limits are pretty strict over here.

I am hoping that keeping the factory resonator will help but looking at those numbers, it'll have a big job to do!

The tracks I visit most often are:
Oulton Park - 105dB at about 4900rpm
Bedford - 101dB (seems very unlikely!)

[JohnnyFive]

Anyone local to Warwickshire with any type of aftermarket axle-back or cat-back on a V8 S550 willing to let me pop round with an SPL meter and have a listen?