Different strokes for different folks........I've heard plenty of K1's and they sound utterly hideous.......but only for my taste others love it.
We've seen welds rotting, fitment nightmares, baffles rattling (i think). Basically it's a case of you get what you pay for.......some break lucky.....others don't.
It's not about having your head up your arse.......Japspeed very specifically are one of the lowest quality brands available for the zed. That's a fact........however they're also one of the cheapest.
Do it nice or blow up mice! ;-)
A k1 at full chat on a track sounds amazing, which can be verified by lots of members on here.
I've had 2, and haven't experienced any of those problems? I know others who have japspeed, and again, have never had any issues. I think it's a handful that have come out poor? But this happens to every product ever produced.
It seems people look down on the japspeed, a lot like car badge snobs - so my quote of people having their heads up their own arse is relevant.
Why should I go and spend £500+ on an exhaust, when I can get one that does the same job, still sounds better than standard, and doesn't rust/rot/break for a fifth of the cost?