Rambo wrote: PS There is also a Quicksilver system
Yes indeed, but maybe should be "There was
". I have the prototype Quicksilver M100 system on my SE on SORN that was organised by Hanger111 who are my closest Lotus people and a Quicksilver agent. The front section wasn't flattened quite enough and rattled against the underframe so I heated it up with oxy-acetylene and bent it to get clearance. Gave the OE pipe to Hanger 111 who sent it to Quicksilver and I then got a correctly flattened front section from Quicksilver which is still in the bubble-wrap. Beautifully made and lovely sound but gave me 'boost creep' - but don't they all? When they listed the M100 exhaust at nearly twice what I'd paid I thought 'they won't sell many at that price' and after a couple of years it had disappeared from their list so doesn't seem to one of the options.
I have a Haywood & Scott system on my Subaru Forester that is a superb improvement, sound and power, and cheaper than the Subaru OE system. I collected it and got my friend at the local 'tyre & exhaust company' to fit it and he commented on how it went "straight down the middle" - excellent fit with no clearance problems. While collecting I asked them if they could do M100 Elan and they said 'bring it in for the day and we'll make one to fit."
Might do one day as it seems they enjoy interesting projects ...www.haywardandscott.com/gallery
They are in Basildon, Essex so anybody in Essex, London or Kent could consider them an option.