• Weighted Shift Knobs (Multiple Thread Pitches)
    Weighted Shift Knobs (Multiple Thread Pitches)

    R Theory Motorsports

    Weighted Shift Knobs (Multiple Thread Pitches)

    Prices are in USD and include shipping within the lower 48 States and Canada. All mounting hardware is included. For international shipping please visit our International Shipping page for a shipping quotation.Introducing R Theory Motorsports Weighted...
    $62.10 - $120.00
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  • NA/NB MX-5 Miata Delrin Differential Bushings (1990-2005)
    NA/NB MX-5 Miata Delrin Differential Bushings (1990-2005)

    R Theory Motorsports

    NA/NB MX-5 Miata Delrin Differential Bushings (1990-2005) - 478

    Prices are in USD. All mounting hardware is included. For international shipping please visit our International Shipping page for a shipping quotation. If you would like to purchase the APR Mirrors without Miata specific mounts, send us an email for...
    $51.99 - $89.99
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  • NA/NB MX-5 Miata Delrin Window Bushings (1990-2005)
    NA/NB MX-5 Miata Delrin Window Bushings (1990-2005)

    R Theory Motorsports

    NA/NB MX-5 Miata Delrin Window Bushings (1990-2005)

    Prices are in USD and include shipping within the lower 48 States and Canada. All mounting hardware is included. For international shipping please visit our International Shipping page for a shipping quotation.If your windows are slow/hard to go up and...
    $29.99
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  • S2000 Battery Tie Down Bracket
    S2000 Battery Tie Down Bracket

    S2000 Battery Tie Down Bracket

    Prices are in USD and include shipping within the lower 48 States and Canada. All mounting hardware is included. For international shipping please visit our International Shipping page for a shipping quotation.A billet aluminum replacement for the...
    $48.25
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  • NA/NB MX-5 Miata Engine Mount Spacers (1990-2005)
    NA/NB MX-5 Miata Engine Mount Spacers (1990-2005)

    R Theory Motorsports

    NA/NB MX-5 Miata Engine Mount Spacers (1990-2005)

    *Prices are in USD and include shipping within Canada and USA. For international shipping please visit our International Shipping page for a shipping quotation.Engine Mount Spacers are thick plates that go under your engine mounts. This raises your...
    $39.99 - $205.11
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  • NA/NB MX-5 Miata Engine Skid Plate (1990-2005)
    NA/NB MX-5 Miata Engine Skid Plate (1990-2005)

    NA/NB MX-5 Miata Engine Skid Plate (1990-2005)

    *Prices are in USD and include shipping within Canada and USA. For international shipping please visit our International Shipping page for a shipping quotation.Protect your oil pan from accidental scrapes that can crack it! Cracking your oil pan on the...
    $175.91 - $205.11
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  • NA/NB MX-5 Miata Frame Rail Cross Brace Additions (1990-2005)
    NA/NB MX-5 Miata Frame Rail Cross Brace Additions (1990-2005)

    R Theory Motorsports

    NA/NB MX-5 Miata Frame Rail Cross Brace Additions (1990-2005)

    *Prices are in USD, and include shipping within the Lower 48 States and Canada. For international shipping please visit our International Shipping page for a shipping quotation.Add some stiffness to your existing Frame Rail Braces! These Frame Rail Cross...
    $386.43
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  • NC MX-5 Carbon Fiber Mirror Kit (2006-2015)
    NC MX-5 Carbon Fiber Mirror Kit (2006-2015)

    R Theory Motorsports

    NC MX-5 Carbon Fiber Mirror Kit (2006-2015)

    Prices are in USD. All mounting hardware is included. For international shipping please visit our International Shipping page for a shipping quotation. If you would like to purchase the APR Mirrors without Miata specific mounts, send us an email for...
    $118.29 - $370.19
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  • GD Bug Eye Impreza Hood Vents
    GD Bug Eye Impreza Hood Vents

    R Theory Motorsports

    GD Bug Eye Impreza Hood Vents

    Prices are in USD, shipping option allows for Free Shipping within Ontario, Canada or shipped within the Lower 48 States and Canada. For international shipping please visit our International Shipping page for a shipping quotation.To get your vents powder...
    $140.16 - $214.98
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  • NA/NB/NC/ND MX-5 Miata Delrin Door Bushings (1990-2022)
    NA/NB/NC/ND MX-5 Miata Delrin Door Bushings (1990-2022)

    R Theory Motorsports

    NA/NB/NC/ND MX-5 Miata Delrin Door Bushings (1990-present)

    Prices are in USD and include shipping within the lower 48 States and Canada. All mounting hardware is included. For international shipping please visit our International Shipping page for a shipping quotation.Best bang for the buck chassis stiffener mod...
    $38.99
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  • NA/NB MX-5 Miata Billet Aluminum Oil Cap (1990-2005)
    NA/NB MX-5 Miata Billet Aluminum Oil Cap (1990-2005)

    R Theory Motorsports

    NA/NB MX-5 Miata Billet Aluminum Oil Cap (1990-2005)

    Prices are in USD and include shipping within the lower 48 States and Canada. For international shipping please visit our International Shipping page for a shipping quotation.Replace your old and boring plastic Oil/710 Cap with a beautiful billet...
    $45.22
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