Just wanted to add a couple links, one of which came from rusty_tlc on MUD:
http://www.grungle.com/endlessair.html
http://www.jeepaholics.com/tech/OBA/oba.htm
http://www.kilbyenterprises.com/kits.htm
The SD508 supposedly is a 5 piston compressor which can put out 9cfm and 300 psi. I think the SD510 (which I have) might do slightly more cfm.
http://www.grungle.com/endlessair.html
http://www.jeepaholics.com/tech/OBA/oba.htm
http://www.kilbyenterprises.com/kits.htm
The SD508 supposedly is a 5 piston compressor which can put out 9cfm and 300 psi. I think the SD510 (which I have) might do slightly more cfm.