Iv bin offered a bigger flexi pipe for the st70 to fit to my 1.8 fitted with the stock st170 bits.

Its similar to these 2.5" flexi's. Stock one is meant to be 2.25"

http://www.mandrelexhaustsystems.com...LEXPIPE/Detail

http://focus.c-f-m.com/focussport25i...usduratec.aspx

Anyone done this or know if its worth doin?

Matt