Our History

IAG (Integrity Auto Group) was established in 2004, initially selling high quality used performance cars. Within a year and a half, IAG sold over 200 Subaru WRX / STI’s. Our clients began requesting us to provide performance products and services for their Subaru’s, which we quickly catered to. IAG extended these services and parts nationally by 2007. Fast forward to 2019, IAG Performance is known as a leader in the automotive performance industry (specifically Subaru) and carries an impeccable reputation among our clients and peers.

IAG has two buildings at our original 2.6-acre location at 1203 Baltimore Boulevard in Westminster, MD. The primary building is occupied by IAG Westminster LLC - a car sales business that is run independently. The second, smaller building on Baltimore Boulevard features a complete automotive collision repair shop with downdraft paint booth, prep station, multiple frame machines, spot welders and numerous work bays.

Our Future

In the spring of 2018 IAG expanded by purchasing a 115,000 sq/ft. warehouse and office space at 1241 New Windsor Rd. The new location allowed us to build a state-of-the-art engine clean room.

In addition to the new engine clean room, we were also able to rapidly expand our manufacturing capabilities. Now featuring new Okuma CNC Mills and Lathes, a Centroid Cylinder Head Porting Machine, and various other machining equipment.

We also expanded our office space to allow room for additional sales and support staff to support our growing product line. Check out our shop tour to see everything inside!

Experts in Subaru engine building

Precision machined engines for your turbocharged Subaru

Our engine builders have spent years honing their craft and are among the best in the world. Our staff has assembled over 14,000 Subaru engines, powering some of the world's fastest cars.

We offer EJ20, EJ25, and FA20 Short Blocks, Long Blocks, Cylinder Head Packages and more. Whether you're looking for a reliable daily driver or a track only drag strip or road race championship competitive build, our experts have you covered.

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Available 24 month/24,000 mile limited warranty

We stand behind every hand-built engine we produce. IAG's Standard Short Block Workmanship Warranty covers your short block for 12 months or 12,000 miles. We have also teamed up with a selection of IAG Certified Installation Facilities which offer up to a 24 month/24,000 mile workmanship warranty when the engine is purchased, installed, and tuned by that IAG Certified Installer.

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FOR SUBARU ENTHUSIASTS, BY SUBARU ENTHUSIASTS

  • IAG team - PAT F

    PAT F

    SALES AND CUSTOMER SERVICE MANAGER

    With a lifelong fascination for engines and a background in high-end car audio, my journey with IAG began as a customer for my 2011 WRX. One of my most memorable Subarus was a Baja XT, which I pushed well beyond its limits offroad. Committed to delivering top-notch service, I take pride in helping clients achieve their automotive dreams and building lasting friendships along the way.

  • IAG team - DEWEY D

    DEWEY D

    BUILD ADVISOR

    Dream Materializer by day, Time Attack pilot by night, Subaru community advocate always. I've been working in and around the Subaru community since 2002 when I picked up my first WRX. The racing bug hit hard and I started competing in Gridlife Time Attack in 2016 and have been at it ever since, even winning a championship in 2023!

  • ROBERT D

    BUILD ADVISOR

    I've worked on Subarus since 2002, when the WRX first hit the scene. Over the years, I've built some of the fastest Subarus around, with a focus on performance, reliability, and doing things the right way.

    Racing is a passion of mine, and I enjoy helping fellow enthusiasts build their cars correctly the first time. Whether for a street or track car, I believe in quality workmanship, honest advice, and creating cars that perform as good as they look.

  • IAG team - KATHY I

    KATHY I

    CUSTOMER SERVICE

    I started learning about cars and Subarus from my garage in 2004, with most of my life dedicated to Subaru performance builds. I fell in love with the GC8 which then became my first car. Since then I have put together Subarus builds from mild bolt-ons to full out drag monsters.

  • IAG team - JACKIE W

    JACKIE W

    CUSTOMER SERVICE

    I started with Subaru in 2002 when the WRX made its debut and quickly worked my way up to a senior master part advisor offering technical assistance to the Subaru community worldwide. Now 22 years and a dozen Subaru's later I'm here at IAG to help with all of your customer service needs!

  • IAG team - KENT L

    KENT L

    WHOLESALE MANAGER

    I inherited my passion for cars directly from my Dad and Grandpa. Growing up I spent a lot of my time in the garage watching them restore just about every classic GM car you can think of. During the last 15 years, I have been fortunate to make a living doing what I love daily. Supporting our dealers and setting them up for success is extremely fulfilling and I couldn't be more proud to do it for a company like IAG.

  • ALESSANDRA N

    RECEPTIONIST

    Funny enough, I've never really had an interest in cars before. However, that has changed since working here. I now spend my weekends watching endurance racing and seeing Dewey send it. I’m fluent in English and Spanish and enjoy helping customers while learning something new every day.

  • IAG team - RANDY B

    RANDY B

    MARKETPLACE MANAGER

    Cars and racing have always been my passion growing up. I purchased my Subaru GC8 in 2007 and have been modifying it ever since! I enjoy HPDE and time attack events with my goal to race on as many different tracks as possible. I love meeting other Subaru enthusiasts and seeing their builds progress over the years.

Our values

To improve people's lives by enhancing their enjoyment of their vehicles through high quality aftermarket parts.

The world's largest Subaru aftermarket performance parts manufacturer. We've built over 14,000 Subaru engines!

IAG stands for Integrity Auto Group. We pledge to always conduct ourselves with Integrity in all aspects of our business.

The fastest Subaru vehicles in the world feature IAG Performance parts. With customers in over 30 countries, we are the world leader in aftermarket Subaru performance.

Proudly made in the USA

  • TRUSTED
    Over 100k customers
  • SUPER FAST
    With Express delivery
  • EXPERT HELP
    Five days a week
  • BEST PRICES
    Unbeatable value