MAP WRX Catted Downpipe Rev 4 | 2015-2021 Subaru WRX MT (WRX-4G-DPC-REV4)
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2015-2021 Subaru WRX MT Rev 4 Catted Downpipe by MAPerformance
When the turbo compresses exhaust gas, it's forced through a narrow downpipe on its way through the exhaust system. This narrow pipe can create lots of turbulence. This air pressure needs to go somewhere, and the factory 2015-2021 Subaru WRX downpipe is a huge bottleneck, limiting flow and robbing power. An upgraded downpipe will allow this spent exhaust gas a quicker outlet to the exhaust system, increasing horsepower and torque through the entire power band!
Features
- 3.5" bell mouth to 3" design reduces exhaust restrictions
- 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
- Utilizes OEM ground strap
- Designed to be used with your OEM turbo outlet gasket
- 304 stainless steel CNC turbo outlet flange
- 100% Made in the USA
Please Note: This will not fit CVT models. This product may be used with either a factory cat-back exhaust system or an aftermarket exhaust system. Please specify via the dropdown before ordering.
May also work with other catbacks, please contact us with any questions!
Applications
- 2015 - 2021 Subaru WRX
Benefits
- Improves Exhaust flow leaving the turbo.
- Won't Rust! Made from High-quality stainless
- Proven to add serious HP!
What's in the Box?
- 1 - MAP WRX Downpipe
- 1 - 3" V-band Clamp
- 1 - M6 Cap Screw
- 1 - M6 Nut
- 1 - 3" 2 Bolt Gasket
- 2 - M10x1.25x40 Bolts
- 2 - M10x1.25 Flange Nuts
- OPTIONAL - Grimmspeed Flange Adapter for Stock Catback
References
Warranty
- MAP Limited Lifetime Warranty
I have had this downpipe(since 2019) and added cold air intake then exhaust on my 18 WRX, around 2 years ago. Having the whole setup from air filter to muffler with MAPerformance parts was a great buy! I am happy with the results and how clean all the welds are. Kind of reviewing more than one part here, but I think it is worth to be said, great bang for buck on all these parts. I added a cold start video to this review, I am running the MAP stage 2 OTS tune that was provided back when I first purchased the downpipe.
The Fit, finish, sound, performance, and delivery. The MAPerformance Cat is as good as it gets at any price.
Thank you for a great product!
Very Fast delivery packaged great! Bolted right up after finally getting original nuts off OEM jpipe. Hardest part was getting top heat shield back on. Would buy again. Recommend hardware kit just in case you round original nuts
The 2 piece design made the install much easier in my driveway than the one piece j-pipe it replaced. I swapped to this pipe because GESI. So far no CEL with an accessport updated post green speed. I'll come back and update if it becomes and issue but so far its working great.
Fits like a glove, no modifying needed. Makes my Subaru WRX sound peppy and helps alleviate the back flow waste into the turbo that the OEM one allows