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Stage 2 Subaru STI Power Package By MAPerformance | 2018-2020 Subaru WRX STi (STI-4G-S2-18+)


MAPerformance

Stage 2 Subaru STI Power Package By MAPerformance | 2018-2020 Subaru WRX STi

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2018-2020 WRX STi Stage 2 Hard Parts & Tune Package By MAPerformance

We are excited about the official release of our Subaru STI Stage 2 Performance Package which, when combined with the included Stage 2 optimized Accessport Tune (currently 2018 models only), is a very potent performance upgrade! Throughout the R&D, testing and calibration phases of the EJ powered 2015+ STI platform, we have been thoroughly impressed with the performance gains from each hardware modification. Better yet, our MAPerformance STI downpipe and air intake systems were designed to support considerably higher power levels allowing for future growth; the included USA Made performance parts support power levels any bolt-on turbo upgrade can throw at them!

When comparing our MAPerformance Stage 2 power package to a stock STI running our Stage 1 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. 

2018-2020 Subaru 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

Applications

What's in the box?

Installation Instructions

Warranty

  • MAP Limited Lifetime Warranty

2018-2020 WRX STi Stage 2 Hard Parts & Tune Package By MAPerformance

We are excited about the official release of our Subaru STI Stage 2 Performance Package which, when combined with the included Stage 2 optimized Accessport Tune (currently 2018 models only), is a very potent performance upgrade! Throughout the R&D, testing and calibration phases of the EJ powered 2015+ STI platform, we have been thoroughly impressed with the performance gains from each hardware modification. Better yet, our MAPerformance STI downpipe and air intake systems were designed to support considerably higher power levels allowing for future growth; the included USA Made performance parts support power levels any bolt-on turbo upgrade can throw at them!

When comparing our MAPerformance Stage 2 power package to a stock STI running our Stage 1 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. 

2018-2020 Subaru 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

Applications

What's in the box?

Installation Instructions

Warranty

  • MAP Limited Lifetime Warranty

Customer Reviews

Based on 30 reviews
97%
(29)
3%
(1)
0%
(0)
0%
(0)
0%
(0)
C
Chad Hall
Wow

2019 Subaru STI 28K miles. Install of the intake was easy. Downpipe, no local shops would touch it so I did the install myself and was fairly easy minus some of access to some of the bolts. I paired mine with the AWE Track exhaust. The total install took some time but I made sure I warmed it up and went back and tightened everything and checked for leaks. Build quality was good, installation on point and when I turned the Key - It went from being a beast to a Monster. It totally changed the feel of the car and made it where you want to drive it everywhere. Yes it is loud but I got power, let me loose loud. Between the exhaust pops between gears and the whoosh coming from the intake, it screams, Let's Go!!! Definitely looking forward to the Stage 3 and have the money ready. I followed all MAPerformance recommendations and could not be happier with the result.

A
Anonymous
Great option for daily driver

Really wakes up the car. Much more responsive and improved overall driving experience. Perfect amount of power for daily driving. Paired with borla catback you’ll get all the rumble and noise when you want it but not too loud. Injector duty cycle hit 96 at wot a few times. Intake isn’t obnoxiously loud like the Cobb sf. Overall great buy would recommend.

N
Nicholas B.
Easy power

I bought this for my 2018 Subaru Sti. I did everything in step just to see how everything preformed. I started with stage1. I flashed the Cobb stage1 first. It was an improvement over stock. Then I flashed the MAP stage1. It pulled harder and had higher boost then Cobb but there was a stutter between 2400 and 2600 rpm. Stage1+ was great. The sound was amazing and it only took half hour to swap out the stock intake to the MAP intake. The power was great but the fuel economy was amazing. Setting the cruise at 60 for my half hour drive to work resulted 30mpg compared to 23mpg stock. Stage2 took 3 hours to install the dp. The instructions failed to say it would take a hour to remove all the 10+ bolts out of the heat shield. I heat wrapped the dp and modified the stock heat shield to fit back on. Power is amazing no more turbo lag it spools instantly. Fuel economy is at 28mpg so still better then stock. The sound of my Invidia exhaust got deeper and only slightly louder. Worth every penny to make my daily driver a blast.

B
Brad Lane
Easy to install, great option!

Went straight from stock to stage 2. Install is super easy if you are any type of mechanically inclined. Took about two hours to install and flash the stage 2 map. Love the way it has power through more rpm’s. Doesn’t build boost and die within a few thousand. Only odd thing is the sport mode has the least response, then intelligent is mid, sport sharp is just the way the car would drive. Just had new tires put on yesterday, and there is enough power to break loose. Saving up to pair the maperformance catback to finish off this stage. If you’re thinking about upgrading, I highly recommend this package. You won’t regret it after your first drive.

J
Josh Roach
All the noises!!!!

Received my stage 2 kit just before Christmas. Installed on Christmas. I had totally forgotten how wonderful it is to hear all the turbo noises. My 18 STi sounds and feels like a completely different car. Much needed power boost. The raw metal piping looks great under the hood too. Thank you MAPerformance for a fantastic stage 2 kit.

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 Click Here For Customer Service.