The stiffy replaces the downpipe but is not essential with the Peco.
You may well suffer from overboost (it seems to be pot luck as there is no consistent pattern). I get overboost, but it is only evident after sustained & heavy acceleration. I've found I can live with it quite easily until I get around to removing the turbo and opening up the wastegate diameter. There is also an issue with a high pitched
screech which some of us experience at high revs but no-one has resolved as yet.
Peco are at
www.Peco.co.uk or 0151 647 6041. The LEC deal was agreed with their Head of R&D Dave Jones (see
LEC thread) who has agreed to leave the price at £250 + P&P for the forseeable future. The quality is very good and fitting should not be a problem (a few of us have blagged our local exhaust fitting places to fit it at a quiet time for ~£10-20 cash).
One final word of warning - they are quite loud!
Geoff