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  • GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
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  • GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
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  • GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
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  • GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
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  • GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
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  • GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
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  • GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
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  • https://youtu.be/8pRckF-XKEc
  • GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (007103)


    GrimmSpeed

    GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX

    PART# GRI 007103
    We Price Match!

    Contact us to ensure you're getting the right part for your car at the absolute best pricing on earth!

    Email - sales@maperformance.com
    Phone 1(888)627-3736



    $ 699.00



    If ordered within hours and minutes
    This item can be delivered by ,
    No Ceramic Coating
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    304 Stainless Steel Catted J-Pipe/Downpipe for Subaru WRX 2015+ Manual

    With the 2015 J-Pipe, the devil is truly in the details and the product development team here at GrimmSpeed has taken the time necessary to knock each of those details out of the park. As a result, what you see here is a meticulously engineered J-Pipe with an innovative flange design, single piece construction, excellent ground clearance and fitment with superb quality and craftsmanship.

    Performance of the J-Pipe was verified on our 2015 WRX using the following method. Our tuned baseline run is the same run that we used in showing the boost control performance of the GrimmSpeed 3-Port Solenoid. We then installed the J-Pipe and retuned the car, using the exact same tuning methodology to ensure consistency. This ensured a real apples-to-apples comparison between the stock J-Pipe and the GrimmSpeed unit. The results showed a gain of 26.7whp (14.1%) and 19.8wtq (9.0%) and are displayed in the chart to the left. The percentage gains should be the focus here, as this particular dyno reads very low (stock baseline was 171). From a completely stock vehicle, users can expect a gain of around 45whp (27%) and 70wtq (41%) with the installation of the GrimmSpeed J-Pipe and custom tuning. The chart on the right shows this comparison.

    Our engineers began by 3D scanning the OEM J-Pipe and vehicle underbody using our in-house FARO Arm. That data was used in CAD to design a pipe that fits perfectly within the tight underbody packaging on a 2015 WRX without sacrificing ground clearance. The 2015 WRX uses a series of OEM brackets to support the weight of the turbo and J-pipe, the most important of which bolts to the turbine outlet flange. Our engineers insisted on using thick 1/2" stainless steel flanges, but also knew that without a clever design, the very important OEM brackets would no longer line up. The GrimmSpeed flange design uses a CNC machined pocket that the OEM bracket sits in during installation, allowing the use of 1/2" thick flanges as well as the factory turbo support bracket! Finally, they worked tirelessly to design and manufacture a J-Pipe that could be bent from a single piece of tubing. This allows for more efficient manufacturing, less potential failure points and a product that fits perfectly each and every time.

    Features

    • Innovative Turbo Flange Design - 1/2" thick while retaining all OEM brackets
    • One-Piece Tube - Ensures exact fitment, robust construction and ease of installation
    • Smooth 3.5" to 3" Transition - Matches turbine outlet size and then reduces quickly to maintain exhaust velocity
    • 100% Made in the USA - Manufactured right here in Minnesota
    • Optimized Tube Routing - Maximize ground clearance and minimize flow restriction without modifying suspension hardware, etc
    • Custom Stainless Turbo Studs - Replace the terrible OEM studs and nuts with these, machined specifically for use with 2015 WRX turbine outlet and our 1/2" flanges
    • Standard 3rd O2 Bung - Allows the future use of aftermarket sensors
    • Grounding Strap Mount - Retains all factory functionality
    • 300 Cell Metallic Substrate Catalytic Convertor (Catted Models Only) - Excellent balance of the reduced restriction of a 'race cat' without the stink of a 200 cell unit

    Applications

    • 2015-2019 Subaru WRX Manual

    What's In The Box?

    • 1x Welded J-Pipe Assembly
    • 1x GrimmSpeed Stainless MLS Turbo to J-Pipe Gasket
    • 1x GrimmSpeed Stainless MLS J-Pipe to Catback Gasket
    • 4x Stainless turbo studs w/ nuts
    • 2x Replacement catback bolts w/ nuts
    • 1x O2 Sensor Plug (plugs third O2 bung for future use)
    • 1x Grounding Strap Bolt (not pictured)
    • 2x GrimmSpeed License Plate Frames
    • 1x GrimmSpeed Sticker

    Warranty

    • Grimmspeed Limited Lifetime Warranty

    Resources

    • Installation Video (linked above in image thumbnails)

    304 Stainless Steel Catted J-Pipe/Downpipe for Subaru WRX 2015+ Manual

    With the 2015 J-Pipe, the devil is truly in the details and the product development team here at GrimmSpeed has taken the time necessary to knock each of those details out of the park. As a result, what you see here is a meticulously engineered J-Pipe with an innovative flange design, single piece construction, excellent ground clearance and fitment with superb quality and craftsmanship.

    Performance of the J-Pipe was verified on our 2015 WRX using the following method. Our tuned baseline run is the same run that we used in showing the boost control performance of the GrimmSpeed 3-Port Solenoid. We then installed the J-Pipe and retuned the car, using the exact same tuning methodology to ensure consistency. This ensured a real apples-to-apples comparison between the stock J-Pipe and the GrimmSpeed unit. The results showed a gain of 26.7whp (14.1%) and 19.8wtq (9.0%) and are displayed in the chart to the left. The percentage gains should be the focus here, as this particular dyno reads very low (stock baseline was 171). From a completely stock vehicle, users can expect a gain of around 45whp (27%) and 70wtq (41%) with the installation of the GrimmSpeed J-Pipe and custom tuning. The chart on the right shows this comparison.

    Our engineers began by 3D scanning the OEM J-Pipe and vehicle underbody using our in-house FARO Arm. That data was used in CAD to design a pipe that fits perfectly within the tight underbody packaging on a 2015 WRX without sacrificing ground clearance. The 2015 WRX uses a series of OEM brackets to support the weight of the turbo and J-pipe, the most important of which bolts to the turbine outlet flange. Our engineers insisted on using thick 1/2" stainless steel flanges, but also knew that without a clever design, the very important OEM brackets would no longer line up. The GrimmSpeed flange design uses a CNC machined pocket that the OEM bracket sits in during installation, allowing the use of 1/2" thick flanges as well as the factory turbo support bracket! Finally, they worked tirelessly to design and manufacture a J-Pipe that could be bent from a single piece of tubing. This allows for more efficient manufacturing, less potential failure points and a product that fits perfectly each and every time.

    Features

    • Innovative Turbo Flange Design - 1/2" thick while retaining all OEM brackets
    • One-Piece Tube - Ensures exact fitment, robust construction and ease of installation
    • Smooth 3.5" to 3" Transition - Matches turbine outlet size and then reduces quickly to maintain exhaust velocity
    • 100% Made in the USA - Manufactured right here in Minnesota
    • Optimized Tube Routing - Maximize ground clearance and minimize flow restriction without modifying suspension hardware, etc
    • Custom Stainless Turbo Studs - Replace the terrible OEM studs and nuts with these, machined specifically for use with 2015 WRX turbine outlet and our 1/2" flanges
    • Standard 3rd O2 Bung - Allows the future use of aftermarket sensors
    • Grounding Strap Mount - Retains all factory functionality
    • 300 Cell Metallic Substrate Catalytic Convertor (Catted Models Only) - Excellent balance of the reduced restriction of a 'race cat' without the stink of a 200 cell unit

    Applications

    • 2015-2019 Subaru WRX Manual

    What's In The Box?

    • 1x Welded J-Pipe Assembly
    • 1x GrimmSpeed Stainless MLS Turbo to J-Pipe Gasket
    • 1x GrimmSpeed Stainless MLS J-Pipe to Catback Gasket
    • 4x Stainless turbo studs w/ nuts
    • 2x Replacement catback bolts w/ nuts
    • 1x O2 Sensor Plug (plugs third O2 bung for future use)
    • 1x Grounding Strap Bolt (not pictured)
    • 2x GrimmSpeed License Plate Frames
    • 1x GrimmSpeed Sticker

    Warranty

    • Grimmspeed Limited Lifetime Warranty

    Resources

    • Installation Video (linked above in image thumbnails)

    Customer Reviews

    Based on 8 reviews
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    J
    J.
    Beautiful JPipe

    As always GS stuff is great. Came with everything needed just add adapter if your still stock for the rest of the exhaust.

    Lower left turbo stud was cross threaded, from the factory. Top right definitely takes some creativity to get the stock pipe off.

    Turbo spool is loud.

    S
    S.C.
    Perfect

    I was worried it wouldn’t be loud enough with the Catt. On the 2015+wrx but I was wrong it sounds so great and instal wasn’t to bad only had problems with one turbo stud

    J
    J.G.
    Great !!

    Pretty simple to install . Great design , clean welds . I love it

    B
    B.L.
    GrimmSpeed Nailed It.

    The J-Pipe is in my opinion the best on the market. The built quality is phenomenal and the fit is better then the OEM J-Pipe.

    Lots of people say the nuts/bolts on the turbo are hard to get to or break loose without a lift but if you soak the nuts with PB Blaster for a few hours before you start its not bad. I had the car on my rhino ramps. I ran into an issue with the top right nut not wanting to break but after some extra soaking and removing of the top heat shield i was able to get to it without a swivel.

    In order to remove the top heat shield i bent the left (front of the car) bracket that the shield was in and pushed it around to the front so it can clear. Made getting to the rear nut a breeze.

    GrimmSpeed provides all of the gaskets and extra studs with nuts with the purchase. I had two studs come out. The only thing i had to buy separate was the adapter that fits between the J-Pipe and the OEM cat back exhaust.

    Another great thing about this J-Pipe is that it does have a grounding nut to hook up the ground wire too.

    I have the Nameless axle backs with the OEM mid pipe and the sound is AMAZING with the GrimmSpeed J-Pipe. Also you can hear the turbo spooling much more now as well.

    As far as performance, the boost comes on much more linear now. Very progressive and more predictable then before the J-Pipe was installed.

    Again great product and should of purchased it a lot sooner.

    E
    E.M.
    GS Catted J Pipe

    First, let me said that Grimspeed products are top-notch, quality products and the catted j pipe is no exception. I was very fortunate disconnecting the OEM j pipe because the nuts came off with no real issues. I will say that I don't think you can remove the top right nut without a swivel joint and make sure to use plenty of penetrating oil. Prior to install, I did wrap the portion of the j pipe near the turbo in DEI thermal wrap just for added heat protection. Install was a breeze and the fit was spot on! I have the catted j pipe connected to the OEM mid-pipe and Nameless muffler delete axle back exhaust and I will say that this combination is LOUD but the crackles and pops it makes are so intoxicating. I'm not sure how the neighbors feel about the cold starts but it sure puts a smile on my face whenever I drive!

    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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