From the shop

Builds & dyno numbers

Real trucks, the parts that went on them, and what they made on the dyno before and after.

• Example build

  GMC Sierra 2500HD · L5P Duramax

  Purple-piped L5P

  +103 HP+195 lb-ft
• Example build

  Ram 2500 · 5.9 Common Rail

  Cummins fuel system refresh

  +57 HP+80 lb-ft