• Community
    • Team 4 Wheel PartsJoin the team and keep up with Greg Adler
    • FacebookAccess exclusive off-road news and giveaways
    • TwitterStay posted on 4 Wheel Parts events
    • YouTubeSee product, installation, and event videos
    • Google+Get the inside scoop on the latest off-roading trends
    • InstagramCheck out exclusive photos
    • Sign Up for Email Offers

Bully Dog leads the pack with it's propane injection system for diesel engines and high performance modules.

  • Bully Dog Parts & Accessories | 4 Wheels Parts

    Air Intake Kits By replacing the restrictive stock induction, RFI increases horsepower, torque, fuel efficiency, and decreases exhaust gas temperatures.

  • Bully Dog Parts & Accessories | 4 Wheels Parts

    Computer Programmers The GT is an all in one downloader, monitor and turning device. The GT features multiple power settings with the ability to adjust drivetrain and user settings. In addition, the GT line features all of the same gauge/monitoring functions as well as the advanced driving coach software aiding drivers in maximizing their fuel economy.

  • Bully Dog Parts & Accessories | 4 Wheels Parts

    Multi Purpose Electronic Gauge The Bully Dog Watch Dog Economy Monitor works on all '96 and later vehicles with an OBDII port. This comes equipped with a set up wizard that calibrates the product to your vehicle in order to provide maximum effciency and calculate wasted energy. The Watch Dog serves as a digital gauge/monitor and features a valuable driving coach for your vehicle. It features the ability to monitor over 20 vehicle parameters all while you receive valuable driving suggestions from the driving coach to maximize fuel economy.

  • Bully Dog Parts & Accessories | 4 Wheels Parts

    Computer Chips & Performance ECM Utilizing state-of-the-art programs, Bully Dog’s 6 Position 4 Bank Chips run the lowest exhaust gas temperatures in the industry, typically running 50 to 100 degrees cooler than competitor products.

  • Bully Dog Parts & Accessories | 4 Wheels Parts

    Gauge Pillars These Molded ABS plastic pillar pods provide a clean and out of the way place to mount your Bully Dog monitor. Monitor Sold Separately.

  • Bully Dog Parts & Accessories | 4 Wheels Parts

    Pyrometer Sensor Pyrometer Probes are used to read exhaust gas temperatures. These probes are a great way to insure that your turbo is not overheating and prevent severe engine damage.

  • Now Hiring

    4 Wheel Parts is Hiring

    To see all of our current job openings

    Apply Now

  • Email Offers

    Sign up now to receive our latest promotions and exclusive offers.

  • Store Locator

    4 Wheel Parts Store Locator

    91 Stores in North America.
    Locate a store near you.

    Store Locator