• Performance Upgrades

    Unlock your vehicle’s full potential with custom performance enhancements designed for power, responsiveness, and drivability. From aftermarket bolt-ons to advanced computer calibrations, we tailor every setup to match your performance goals.

    Services Include:

    • ECU & TCU calibrations

    • Aftermarket performance upgrades

    • Intake & exhaust systems

    • Fuel system upgrades

    • Drivetrain enhancements

    • Performance diagnostics

  • Engine Builds & Replacements

    Whether you’re replacing a worn engine or building a high-performance setup from the ground up. We provide reliable engine solutions built for both street and track performance precisely calculated to your targeted goal.

    Services Include:

    • Engine swaps

    • Engine replacements

    • Performance engine builds

    • Supporting modifications

    • Cooling system upgrades

    • Drivetrain integration

  • Forced Induction Systems

    Take your build to the next level with professionally designed and installed turbocharger or supercharger systems. We design and support boosted setups with the proper tuning and supporting modifications to maximize horsepower and reliability.

    Services Include:

    • Turbocharger installations

    • Supercharger systems

    • Intercooler upgrades

    • Boost system diagnostics

    • Supporting fuel upgrades

    • Custom tuning solutions

  • Monday - Friday 10am to 10pm and Saturday - Sunday 7am to 10pm.

  • Call or text us at 920-492-1984 to schedule a service!

  • You can request a quote by texting or giving us a call. Share your vehicle details and the work you need, and we’ll provide you with an estimate.

  • In many cases, we can provide a quote online or over the phone if you give us the details. For more complex jobs, we may ask you to bring your vehicle in for a thorough inspection and precise diagnosis so we can provide a complete estimate.

Quiet isn’t our style. Performance is.

We make sure your ride delivers the sound and performance it was built for.

Hear from Our Customers

  • "I highly recommend Grizzly Performance great service, very friendly and honest explained every detail. Cole gave my car life back after sitting in my garage for months."

    Viridiana L.

  • "I recently had a great experience with Grizzly Performance, and I want to especially highlight the outstanding help I received from Cole. I came in with a gas gauge issue that was causing some frustration, and Cole went above and beyond to diagnose and resolve the problem efficiently. His expertise and friendly attitude made the entire process smooth and stress-free."

    Scott H.

  • "Hands down the best experience working with this mechanic. He was transparent about prices and diagnoses, and was diligent about finding the root cause of the trucks problems."

    Emily B.

Contact Us

Contact Grizzly Performance today, and we’ll provide the support you need, whenever you need it. Fill out some info and we will be in touch shortly.

Service@Grizzlyautoperformance.com

GREEN BAY, WI 54304

Click to call
Click to text

Stay Connected

Built on precision, reliability, and performance, Grizzly Performance specializes in custom upgrades designed to maximize power and drivability. Whether you’re planning a full engine swap or performance build, we’re committed to delivering results you can feel behind the wheel.