Choose Your Car 
  • STM Silicone Reducer Couplers (R40B)
  • STM Silicone Reducer Couplers (R40B)

    MAP price match guarantee Unbeatable Price Guarantee
    no codes, no bs, just parts

    STM

    STM Silicone Reducer Couplers

    PART#
    We Price Match!

    Contact us to ensure you're getting the right part for your car at the absolute best pricing on earth!

    Email - sales@maperformance.com
    Phone 1(888)627-3736



    $ 14.00

    Built To Order Delivered by , to your door when ordered within hrs and mins
    Quantity
    - +


    Fits Your
    MAP Loyalty: Earn $ 0.28 Toward Next Purchase!

    Silicone Reducers

    STM has searched out the very best silicone hose manufacturers and are proud to offer their own brand of STM silicone couplers. They would not put their name on these if they were nothing less than the best.

    Features

    • Reducer Coupler
    • 4-Ply Silicone
    • Measurements in I.D. (Inner Diameter)
    • Gloss Black
    • Extremely Smooth
    • Made in the USA!

    Applications

    • Universal

    Warranty

    • STM Products are made in the USA! Lifetime Warranty on STM Parts to the original purchaser against manufacturing defects.

    Silicone Reducers

    STM has searched out the very best silicone hose manufacturers and are proud to offer their own brand of STM silicone couplers. They would not put their name on these if they were nothing less than the best.

    Features

    • Reducer Coupler
    • 4-Ply Silicone
    • Measurements in I.D. (Inner Diameter)
    • Gloss Black
    • Extremely Smooth
    • Made in the USA!

    Applications

    • Universal

    Warranty

    • STM Products are made in the USA! Lifetime Warranty on STM Parts to the original purchaser against manufacturing defects.

    Customer Reviews

    Based on 7 reviews
    100%
    (7)
    0%
    (0)
    0%
    (0)
    0%
    (0)
    0%
    (0)
    J
    J.
    Odd Fellows

    None of the other competitors had the size i needed to connect the intake to the throttle body on my little custom scooter. STM made the size i need and MAPerformence supplied the coupler. It was a little longer than required but i was able to shorten the length with a simple razor blade and still keep the dimensions close enough that it worked perfectly. Looks great, feels like its a good quality material and is holding up well.

    No one answered the phone when i called those few times but otherwise, i got order/receipt conformation thru email, it was Fast Shipping, tracking number was provide and prices were fair. 100% would buy again.

    m
    m.w.

    My stm coupler worked perfectly, thanks again.

    A
    A.
    Perfect product

    Easy to install holding a steady 40 psi no issues

    A
    A.H.
    Good Quality

    Obviously a Vibrant part. But that's a good thing. Good quality, fit and finish.

    D
    D.C.
    Hose review

    So i got a new IC and need different size couplers and bought them here. Shipping was fast and the product seems to be quality and good for my needs.

    MAP Limited Lifetime Warranty

    1.) All MAPerformance in-house fabricated parts include a Limited Lifetime Warranty for the Original Purchaser. This warranty only applies to the original purchaser and is non-transferrable. If the product fails it would need to be determined by MAPerformance that it is due to manufacturing defects in materials or workmanship.

    2.) This does not cover normal wear and tear. Improper use, modification, or abuse voids this warranty. MAPerformance will not be held responsible for additional costs due to the failure of a product (cost of sale, towing, labor, etc.). Warranty claims must be submitted to MAPerformance for review.

    3.) You must create a support ticket to acquire your return authorization number prior to returning the product.

    4.) Warranty claims will not be honored if the product was not purchased through an approved dealer.

    For warranty evaluation please create a support ticket via this form here.

    We use cookies to offer a better browsing experience, analyze site traffic, personalize content, and serve targeted advertisements. Please review our privacy policy & cookies information page.  If you continue you consent to our privacy policy & use of cookies.Accept

    Hello!

    Unfortunately due to vendor restrictions we are unable to sell this brand within Australia or the UK. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

    Hello!

    Unfortunately due to vendor restrictions we are unable to sell this brand within Australia. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

    Hello!

    Unfortunately due to vendor restrictions we are unable to sell this brand within your country. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

    Hello!

    Unfortunately due to vendor restrictions we are unable to sell this brand within California. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.