2015-2021 Subaru WRX STI Downpipe Upgrade 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: As sound level and emissions laws vary based on location, please consult your local authorities for additional information.

Features

• Semi-divided Cast head pipe to maximize flow and eliminate boost creep!
• Divorced wastegate dump 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

Applications

• 2015-2021 Subaru WRX STI*
• *Will NOT Fit RHD Models

What's in the box?

• One Piece Downpipe
• Required Hardware & Gaskets

Installation Instructions

• Download Install Instructions Here

Warranty

• MAP Limited Lifetime Warranty