Re: Stainless steel sports exhaust
3 silencers means quieter, I personally would have gone with 2. If he has forgotten to refit cat then he will have to remake that part of system to fit it back on again! The cat on the 24v 164 is very good, does not rob much power at all.
2.5" is pretty big, I went for 2.25" free flow stainless and it sounds as loud as I would want it, but damn it sounds good.