Comparing gallons to gallons, a six-gallon McGraw air compressor is available for $129.99 at Harbor Freight, and a Fortress six-gallon compressor costs $159.99.

Are Harbor Freight Air Compressors Any Good? Douglas Glad Writer Jun 08, 2020. See All 10 Photos. ... The Fortress compressor from Harbor Freight sells for $399 (PN 56403).

If you're looking for one of the strongest air compressors sold at Harbor Freight, Fortress has you covered. You can pick up the Fortress 225 PSI air compressor for $299.99, making it the most ...