[stephen low]

I was a bit lucky at the test as I've measured mine at 93 at the right test revs 3950rpm but my man came out initially saying ok now you rev to 4500rpm,

I challenged his mathematics, ie 3/4 of max power rpm and he re-thought through and said your right rev to about 3,500 - 3600 and bingo - 89.3 dB.

Even he acknowledged these cars need a bit of burble.

So no exhaust work needed for the moment.

Cheers