I would check with pirate4x4.com and gmfullsize.com. They are offroad specific forums and have tons of info about aftermarket GM suspensions, not to mention many desert prerunners.

 

Dezertsilverados, race-dezert, dezertrangers. gmfullsize is great for street suspension as well.

 

I'm building my own

 

^^^^^^^^^^^^^post pics

 

99-06 Chevy Silverado 1500 4WD Chase Kit

This is the one Ive been looking at for my Avalanche

 

Didn't want to read entire post but check out brenthol offroad and fabrication. They have a bolt on torsion bar eliminator that replaces the upper control arm and allows u to run coil overs. There **** is pricey tho. 4k

Ill try and find u there site

Edit: ^see post above for web site.

 

Dixon Bros Racing and JD Fabrication are the only serious 4wd Longtravel kit producers out there at the moment. Everything else will be custom fabbed or haven't posted anything online for sale yet. JD Fabrication even has a 4wd mid-travel kit out now.

That Brenthel kit is weak as hell and doesn't even use an engine cage. There's no support to handle the increased load on the coilovers and the frame wasn't designed for the suspesion load to be managed at that angle. Their kit is in NO WAY a long travel kit. It is a micky mouse coilover conversion that wouldn't stand a chance operating at high speed offroad. That company is capable of so much better and I can't believe they even put such a thing on the market under that label. They make awesome stuff for the F*#D's though.

 

+1 for Dixon Bros and JD Fab. A buddy of mine ran a JD Fab kit on his Yoda and it was very well built. Haven't seen much from Dixon bros in person but I've heard from more than a few serious desert racing guys that their stuff is high quality as well.

 

Anyone ever follow through with a NBS 4wd kit?