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Affirm Financing

You can buy-now, pay-later, and split your order into monthly payments! Just put together an order, and you'll now see Affirm Financing as a payment option!

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Learn about our new site

We're THRILLED to present to you our new website! We've been working hard to provide you with the most user-friendly experience possible. Read more

Check out our new Blog

Everything from our Project Car, to the Flatirons Tuning Rally Team, to Performance and Tuning posts, we cover it all!

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Flatirons Tuning Video

Did you know that we have our own Youtube channel? We cover everything including installation videos, product reviews, track day events, and much, much more!

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Flatirons Tuning Video Gallery

Featured video

Ever since we made our first two videos about swapping an STI 6-Speed into either the GD WRX (2002 - 2007) or the GR WRX (2008 - 2014), there are a number of common question that we have received. Since we were helping Tasso Koch from OTC Racing put an STI 6-Speed transmission into his Rally car, we decided that this would be the perfect time to revisit some of these topics.

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Latest News From The Shop

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  1. What is the best hose clamp?
    What is the best hose clamp?

    We all know about worm clamps.  Love them or hate them.

    The main issue with a worm c

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  2. What is the difference between a Catch-Can and an Air-Oil Separator?
    What is the difference between a Catch-Can and an Air-Oil Separator?

    In the Subaru world, if you have a modified WRX or STI, most likely a Catch-Can or Air-Oil Separa

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  3. Do I need a Catch-Can or an AOS?
    Do I need a Catch-Can or an AOS?

    If you are looking to reduce or eliminate the oil and oil vapor that gets into your cars intake t

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  4. The Search for a Functional STI Motorsport Wing
    The Search for a Functional STI Motorsport Wing

    As you start to track your car and get faster, you can make a lot of changes and modifications to

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  5. What is a Subaru Hybrid Swap?
    What is a Subaru Hybrid Swap?

    From 2002 to 2005, the Subaru WRX came with a 2.0 liter engine, but when the STI became available

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  6. What do you need to know if you have had a bearing failure?
    What do you need to know if you have had a bearing failure?

    If you have had an engine failure in your Subaru, and it has been diagnosed as a bearing failure,

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