Edelbrock E-FORCE Supercharger Stage 1 Street System [TVS Series 2300 | HP 399 | Torque (Ft-lbs.) 395 | No Tune] (2011-2013 Silverado & Sierra HD 2500 6.0L V8) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS