Lingenfelter L380xx1410 Lingenfelter Camaro Cast 241 MM Aluminum Differential 2010-12 v1.9 - Manual (Page 22)

Page 21.
73. Re-install the chassis stiffening bracket by
re-installing the four (4) bolts shown. Torque the
bolts to 18 ft-lbs (for a Camaro coupe) or 43 ft-lbs
(for a Camaro convertible).
74. Re-install the rear wheels. Torque these
bolts to 122 ft-lbs in a 5 point star pattern.
75. On manual transmission equipped
vehicles, recalibration of the ECM is only needed
on ratios higher than 3.73:1. On automatic
transmission equipped vehicles recalibration of
the ECM and the TCM is required for all ring and
pinion ratio changes.
72. Re-install the rubber exhaust holders onto
the barbs as shown.