Bean's Diesel Performance D66 is the ORIGINAL true DIRECT bolt-on high performance turbo for the 94-97 OBS Power Stroke Injectors. Check this link right here http://bdpshop.com/performance/fuel-systems/injectors.html for more information on OBS Efuel. This is a high performance stock replacement super. This upgrade will certainly enhance the air flow from the stock 750CFM to over 1050 CFM!