I have the Librands Quad Exhaust system on my S1 (cost me £1500 ish fitted earlier this year) and its fantastic - not intrusive at all and sounds fantastic when opening her up, I do wish it was a bit louder actually however the more miles I do the better its starting to sound, with more burbles and pops - I have only done 400miles with it on so its not fully bedded in yet.
Ian
I have the librands ,quad pipe,rear exit exhausts fitted to my S1 -
- the sound is not too intrusive,particularly on tick over/idle.I also fitted an ITG air filter which further improves the sound (and pick up!) on acceleration
I quite fancy the side exit pipes but a number of people have commented that they can be a bit
'wearing' on a e.g. a motorway run....
James
More details on the Air Filter please!
For series 1 the quad rear is the pick. Side pipes on the S1 are an expensive option - at the factory it's reputedly a 5k job..
On s2 and later going to side pipes is cheaper (I had my s2 converted - around 1500 about 7 years ago). On the later cars I would go side pipes (especially on 4.8 engine)...
Infinity exhausts do the side pipes for approx £400. The factory don't supply them anymore for the S1.
