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10% Weistec

Weistec 722.9 Transmission Pan
The Weistec 722.9 Transmission Pan provides improvement to the performance of the 7 speed 722.9 transmission in a few ways.  Primarily is the increased flu...
$699.00
Weistec High Flow Air Filter Set  M157 / M278
These Weistec filters are compatible with the 5.5 Biturbo and the 4.7 Biturbo (M157 and M278 engines). When analyzing the factory airbox and flow characteristic...
$279.00

20% Weistec

Weistec M278 W.1 ECU Upgrade
540 HORSEPOWER, 715 FT-LBS TORQUE! As an industry leader in tuning and calibration, Weistec Engineering is proud to introduce the much anticipated ECU tune f...
$1,399.00
Weistec M278 W.2 ECU Upgrade
+159 HORSEPOWER  +322 FT-LBS TORQUE! As an industry leader in tuning and calibration, Weistec Engineering is proud to introduce the much anticipated ECU...
$1,499.00