Spillman
.020 Over
I think they are limited to 134 out of the box, I'll need someone to confirm that one.
And no, never had any issues with the dealer over the mods or add-ons. In fact the selling dealer is the one who did my dyno-tune after I installed all the crap.
Short-comings ..... well the one right off the tip top of my head is that they ride like a dump truck without changing the shocks and fork springs.
134?