Big Rig Products

ECM Tuner Caterpillar Cummins Detroit Paccar Heavy Duty GT (Gauge Tuner)   The Heavy Duty Gauge Tuner incorporates Bully Dog's SAE tested and emissions tested diesel engine tuning for both power and economy.* Not legal for sale or use on pollution...

Benefits & Features · Better design, pressure fitted to eliminate leaks. Sharp corners have been smoothed for better flow· High Quality material to eliminate cracks· Ported to eliminate any flow interference· Ceramic...

Benefits & Features · Better design, pressure fitted to eliminate leaks. Sharp corners have been smoothed for better flow· High Quality material to eliminate cracks· Ported to eliminate any flow interference· Ceramic...

Bully Dog's ECM Tuner for Cummins®, is a response to fleet owners looking to tune and go. This heavy-duty tuner is streamlined to include 3 power levels, a speed limiter calibration feature and DTC Trouble Code Reader. The beauty of the ECM Tuner is...

Bully Dog's ECM Tuner for CAT®, is a response to fleet owners looking to tune and go. This heavy-duty tuner is streamlined to include 3 power levels, a speed limiter calibration feature and DTC Trouble Code Reader. The beauty of the ECM Tuner is in its...

These kits give the Class 8 customerproper, convenient & ease of one stop shopping for the necessaryfuel line necessary to installthe FASS Fuel System. Instead of searching for all the hose and fittings required, this package provides everything...