compressor, electric or engine driven

if you buy one from kilby, spring for the more expensive one, it spews alot less oil and stays cooler, here is another link that will help you out alot

http://www.fullsizechevy.com/forums/showthread.php?t=192904

I'll say it ahundred times. nothing beats a york, dont waste time with a sanden, do it once and get a york. you will never look back.