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  • 2015 - 2018 Subaru STI Downpipe By MAPerformance
  • 2015-2021 Subaru STI Downpipe Upgrade By MAPerformance | Catted/Gesi Options (STI-4G-DPC)
  • 2015-2021 Subaru STI Downpipe Upgrade By MAPerformance | Catted/Gesi Options (STI-4G-DPC)
  • 2015-2021 Subaru STI Downpipe Upgrade By MAPerformance | Catted/Gesi Options (STI-4G-DPC)
  • 2015-2018 Subaru STI Downpipe Upgrade By MAPerformance | Catted/Gesi Options (STI-4G-DPC)
  • 2015-2021 Subaru STI Downpipe Upgrade By MAPerformance | Catted/Gesi Options (STI-4G-DPC)
  • 2015-2021 Subaru STI Downpipe Upgrade By MAPerformance | Catted/Gesi Options (STI-4G-DPC)

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    MAPerformance

    2015-2021 Subaru STI Downpipe Upgrade By MAPerformance | Catted/Gesi Options

    PART#
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    Give us a call to get the best prices and parts for your build. Or, just call us with a cool racing story...either way we're here.

    Email - sales@maperformance.com

    Phone 1-888-627-3736



    $ 606.89   $ 635.99
    Instant Savings of % ()

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    2015 - 2021 Subaru STI Downpipe By MAPerformance

    When the turbo compresses exhaust gas, its forced through a narrow OEM downpipe on its way through your exhaust system. This narrow pipe creates back pressure & reduces exhaust flow leaving your car short of its true power potential. MAPerformance has crafted the perfect solution to unleash this power and is proudly offering it to the eager 15+ Subaru STI market.

    Designed to last a lifetime, the MAPerformance 2015 - 2021 STI Downpipes are available with a high flow race catalytic converter, an optional GESI cat.

    Built in-house from 3" mandrel bent 304SS piping our semi-divided head pipe maximizes exhaust flow and helps to eliminate unwanted boost creep. Utilizing a thick 1/2" stainless steel turbo outlet flange, high-quality interlocking lined stainless steel flex section and sporting an additional O2 bung, this sti downpipe has been designed to outperform & outlast our competitor's offerings at a price point that won't break the bank.

    Mating our MAPerformance STI Downpipe to an OEM factory exhaust or aftermarket exhaust is a breeze. Simply select the option you'd like in the drop downs above and we will include all the necessary hardware.

    Disclaimer: This product is intended for off road use only. As sound level and emissions laws vary based on location please consult your local authorities for additional information.

    STI Downpipe Features:

    • Semi divided head pipe to maximize flow and eliminate boost creep!
    • 1/2 thick stainless turbo outlet flange
    • Extra o2 bung and plug
    • Made from 304 stainless steel for superior corrosion resistance and enhanced appearance
    • Mandrel bent tubing throughout optimizes exhaust flow
    • Stainless steel flex section reduces stress from engine movement increasing longevity
    • Designed to be used with your OEM turbo outlet gasket
    • 100% Made in the USA

    Applications

    • 2015-2021 Subaru STI

    What's in the box?

    • One Piece Downpipe
    • Required Hardware & Gasket

    Installation Instructions

    Warranty

    • MAP Limited Lifetime Warranty

    2015 - 2021 Subaru STI Downpipe By MAPerformance

    When the turbo compresses exhaust gas, its forced through a narrow OEM downpipe on its way through your exhaust system. This narrow pipe creates back pressure & reduces exhaust flow leaving your car short of its true power potential. MAPerformance has crafted the perfect solution to unleash this power and is proudly offering it to the eager 15+ Subaru STI market.

    Designed to last a lifetime, the MAPerformance 2015 - 2021 STI Downpipes are available with a high flow race catalytic converter, an optional GESI cat.

    Built in-house from 3" mandrel bent 304SS piping our semi-divided head pipe maximizes exhaust flow and helps to eliminate unwanted boost creep. Utilizing a thick 1/2" stainless steel turbo outlet flange, high-quality interlocking lined stainless steel flex section and sporting an additional O2 bung, this sti downpipe has been designed to outperform & outlast our competitor's offerings at a price point that won't break the bank.

    Mating our MAPerformance STI Downpipe to an OEM factory exhaust or aftermarket exhaust is a breeze. Simply select the option you'd like in the drop downs above and we will include all the necessary hardware.

    Disclaimer: This product is intended for off road use only. As sound level and emissions laws vary based on location please consult your local authorities for additional information.

    STI Downpipe Features:

    • Semi divided head pipe to maximize flow and eliminate boost creep!
    • 1/2 thick stainless turbo outlet flange
    • Extra o2 bung and plug
    • Made from 304 stainless steel for superior corrosion resistance and enhanced appearance
    • Mandrel bent tubing throughout optimizes exhaust flow
    • Stainless steel flex section reduces stress from engine movement increasing longevity
    • Designed to be used with your OEM turbo outlet gasket
    • 100% Made in the USA

    Applications

    • 2015-2021 Subaru STI

    What's in the box?

    • One Piece Downpipe
    • Required Hardware & Gasket

    Installation Instructions

    Warranty

    • MAP Limited Lifetime Warranty

    Customer Reviews

    Based on 24 reviews
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    C
    C.
    Awesome Setup!

    I decided to go directly to the MAP Stage 2 Setup (Intake + Catted Down Pipe). I never ran the intake without the downpipe, so I am not sure how much of the power increases to give to credit the intake alone, however, the combo is amazing! So my my setup, MAP Intake & Down Pipe, MAP Stage 2 93 Octane tune, Q300 Invidia Catback, GFB Recirculation Valve and IAG Street Series AOS, in a 2019 STI. The huge power & torque increases are in the Low to Mid range, with more power up high as well. I can believe I am getting close to 333HP to wheels they advertise! For an everyday driver the car is amazing now. I run the Cobb access port all the time just to monitor engine knock, DAM, Air Fuel, and intake temp. DAM has never moved, occasional feedback knock to about -1.4, but maybe once in 1/2 hour of driving so far. Intake is about 5 degrees over ambient when you are on throttle, so its truly picking up the coolest air in the engine compartment. I get some occasional small pops form the exhaust which I actually like and a little louder overall for the exhaust but no highway drone. Boost level hits 20 psig on most hard pulls, it gets there much faster than before giving you more power through a wider RPM range. I though the intake sounds would be too much, but they are very cool. It does not make noise until you get into boost, so perfect for me as it quiet while cruising. The fitment on the downpipe was spot on as well. If you want to go to stage 2 + Intake without a paying for a pro-tune this is the way to go for sure!

    Z
    Z.M.
    Great fit, better sound.

    One of the single best purchases I have made for my 2017 STI. The welds are immaculate the bends are perfect. The heat shield may need some alterations to fit, but does still fit. Wouldn't change a thing 3 out of 5 stars. (Joke).

    J
    J.E.
    Maperformance downpipe

    I have a 2017 sti and have purchased a maperformance stage one kit plus just got done installing their downpipe. Well I'm more then impressed with the quality of their products. Thank you for helping me bring my car to life. One thing I would recommend if your going to be installing maperformance downpipe is to pick up an aftermarket heat shield.

    S
    S.S.
    All smiles

    Perfect figment, product is amazingly made and with the tune the car came to life very happy. Thanks to Kevin and Eric for helping with my questions.

    A
    A.D.
    Should definitely buy a stage 2 package

    what a b**** to put this in but well worth the headache, support flange was bent on order but. I was able to tie it down and straighten it out but still doesn't line up for me correctly to securely bolt it down, so I zip tied it until im ready to adjust everything .but well worth the work shoulda bought the stage 2 package right off the bat, huge difference from my catless pipe huge gains car runs amazing now . I apperciate you guys sending me out the pipe quickly thank you all for everything amazing quality and craftsmanship I believe my build will be mostly MAperformace in the future.

    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.

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    If you have any questions please contact us at: 1-888-627-3736 or Email Us Here.