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Erik Blume  March 30 2018

MAPerformance Stage 2 Kit and Hard Parts

We are excited for the official release of the MAPerformance Stage 2 Performance Package which, when combined with the MAPerformance Stage 2 OTS Tune, is a very powerful performance upgrade! Throughout the R&D, testing and calibration phases of this 2015+ STI platform, we have been thoroughly impressed with the performance gains with each hardware modification adding significant power, torque and agility. Better yet, the hardware was designed to support considerably higher power levels so no worries about future upgrades; these performance parts support all the power you’d like to make with any bolt-on turbo upgrade and related modifications!

When comparing the MAP Stage 2 package to a stock STI with the MAP Stage 1 OTS Tune, there are many advantages far beyond the improved sound and raw power. Not only are the power and torque gains inherently impressive, but it’s also important to note how much less work required from the turbo and less stress on the engine to achieve the higher power levels. Below we’ll look at some of the key benefits and advantages the Stage 2 hardware combined with the Stage 2 Tune.


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 - 2018 STi Downpipes are available with a high flow race catalytic converter, an optional GESI cat or in a catless version for those customers without any restrictions on emissions.

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.

Click For More Information on the MAP Downpipe!

STI Downpipe Features:

  • Semi divided head pipe to maximize flow and eliminate boost creep!
  • Divorced wastegate dump tube to increase turbine flow
  • 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


MAPerformance is proud to offer our USA Made cold air intake kit specifically for the EJ powered 15-17 STI. Like all MAP products, we've spent countless hours to design, test and build what we believe is the best all around 15+ STI air intake offering. Not only does this intake produce proven power gains it does it without breaking the bank, and that's not all.

Pop the hood on your 2015-2017 Subaru STi and people are sure to notice your MAPerformance cold air intake system! Sporting a large 6" high flow Green Filters Air Filter with a raw stainless steel or wrinkle black coated finish, the question "are you stock" will be a thing of the past!

During the design phase of this intake, we paid close attention to details to ensure customers get the most bang for their buck, like using 304ss & including a unique velocity stack. Your Subaru STI intake kit will feature a full 3" mandrel bent intake pipe for maximum velocity and charge potential. This design combined with our in-house manufacturing processes ensures a seamless transition of intake air flow beginning at the 6" high-flow cone air filter, flowing smoothly through our proprietary velocity stack and directly feeding your turbo inlet.

Click For More Information On The MAP Intake Kit!

STI Air Intake Features

  • Full 3" tubing design reduces restrictions
  • Made from 304 stainless steel for superior corrosion resistance and enhanced appearance
  • Mandrel bent tubing throughout optimizes intake flow
  • Velocity stack for increased airflow
  • Made in the USA


    STI Stage 2 Kit Features

    • Capable of 331whp/347wtq (+59whp/+58wtq over STOCK!)
    • 304 Stainless Steel Components
    • 100% Mandrel Bent Piping
    • 3" Piping For Improved flow
    • Fully Tig Welded and Back-purged
    • USA MADE

      Click For More Information On Our Stage 2 Package!

      We have what everyone wants to see! Dyno Graphs! Below we have our stock 2017 STi pull vs. MAP stage 1 OTS tunes (91 and 93 octane) as well as the MAP Stage 2 Kit (also 91 and 93).

      MAP OTS Stage 1 Tune (FREE with Accessport Purchase) VS Stage 2 Power Package (91 and 93 octane):

      STi Stage 2 Sound Clips and Review: 

      Please feel free to ask any questions! Email:

      Ian with MAPerformance

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      1 comment

      • Jacob: June 04, 2018

        All.nice but i ordered the stage 2 and recieve all but the accessport. Unfortunately i know i clicked to get it and after paying 1200 dollars sales said no i didn’t…. So i any idea components now

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