Ingersoll Rand, but then again I am very partial to them.(worked for them for 12 years now). I also have a Campbel haufeild and it works good for occasional use.

Rob Dunn
1976 Dart Sport 360
2000 dakota RT 408 with 150 nitrous
2013 Dodge Ram 1500 Hemi
2009 Jeep Patriot