New Nick at JDM
Full Access Member
The tune, upper pulley, and belt are the only difference between phase 1 and 2 that I am aware of.
The Roush trucks came with 3 different serpentine configurations depending on year of truck/supercharger kit
1.) No change to pulleys in serpentine system. (Early trucks 2011 to 2013 ish)
2.) Extra idler pulley on drivers side. The provision is on stock timing covers, just not used. (requires the elusive 6pk3205 belt) (2013 ish)
3.) Fead kit added (2014)
The Roush trucks came with 3 different serpentine configurations depending on year of truck/supercharger kit
1.) No change to pulleys in serpentine system. (Early trucks 2011 to 2013 ish)
2.) Extra idler pulley on drivers side. The provision is on stock timing covers, just not used. (requires the elusive 6pk3205 belt) (2013 ish)
3.) Fead kit added (2014)