Diesel Tech / How-To Turbocharged Upgrade: HSP Diesel Duramax S300 Turbo System Making 500hp in a 2001 to 2010 GM Duramax is easy, right? While easy may not be the right word, the Duramax is a very capable engine; with the right… J.S. HansenandSurajpal Singh BishtJanuary 8, 2016No comments 7 shares 0 0 7 6 minute read