Ralliart are fitting a Hayward and Scott sports exhaust as an option on the Extreme for £789 |PLS| VAT. I have driven it and it sounds OK to me but that is IMO! Cannot remember the performance gain but thought it was good enough to specify it on my car.
I am having the HKS Hyper Titanium Tip fitted tomorrow to my 7 (£475 |PLS| VAT).
Spoke to Ralliart last week and they had received 10 H and amp;S systems but these were being kept/tested for the Extreme. Lead time now is about 3-4 weeks for anybody wishing to order one. H and amp;S also do a cat-free replacement pipe for about IIRC £85. Power Engineering are also working on a full system for Mitsubishi UK.
BTW the HKS Racing Suction Kit is about 2 weeks away. Anybody know what air induction kit they use on the 7 Extreme (picture in this month's copy of EVO)?
ralliart picked me up from the station in T1RBO (when i went to pick up my TME), which I think has the H and amp; S setup. It was very boomey IMO and I would not fir it to a car I intended to drive for any sort of distance. Construction looked good though.