Brand-new surplus Cummins B6.7 / QSB6.7 engines are for sale for the Atlas Copco XAVS 378 portable air compressor, which is powered by a Cummins 6.7-liter diesel. Our in-stock builds are rated 225 hp and 260 hp. Save time and money with an in-stock engine instead of a months-long factory order. Each unit is never installed and ships from Houston, TX. Ask for a Atlas Copco XAVS 378 engine quote with freight to your site.