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GrimmSpeed J-Pipe 3in Catted - Subaru WRX 2015+
GrimmSpeed J-Pipe 3in Catted - Subaru WRX 2015+
GrimmSpeed J-Pipe 3in Catted - Subaru WRX 2015+
GrimmSpeed J-Pipe 3in Catted - Subaru WRX 2015+
GrimmSpeed J-Pipe 3in Catted - Subaru WRX 2015+
GrimmSpeed J-Pipe 3in Catted - Subaru WRX 2015+
GrimmSpeed J-Pipe 3in Catted - Subaru WRX 2015+
GrimmSpeed J-Pipe 3in Catted - Subaru WRX 2015+
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User Media for: GrimmSpeed J-Pipe 3in Catted - Subaru WRX 2015+

GrimmSpeed J-Pipe 3in Catted

Subaru WRX 2015+

This item is no longer available.

Features & Product Details

RallySport Direct proudly carries a great selection of quality performance upgrades by our friends over at GrimmSpeed.


This is the GrimmSpeed 3-Inch Catted J-Pipe for those of you looking for a great way to improve the power, performance, and the sound of your vehicle. GrimmSpeed designed this J-pipe with smooth bends along with an increase in the piping diameter to remove any turbulence in the flow path of the exhaust. This reduces spool time and improves the turbo and throttle response while allowing the turbocharger to exhale exhaust gases quicker and more efficiently. 





  • Super durable stainless steel construction
  • This is a one-piece tube with Grimmspeed’s patented turbo flange design
  • The flange is ½” thick while retaining all OEM brackets
  • Provides a smooth 3.5 to 3” transition from the turbine outlet to the rest of the pipe
  • Excellent ground clearance without having to alter suspension components
  • Custom stainless turbo studs to accommodate the Grimmspeed ½” flanges
  • Standard 3rd O2 bung for use of aftermarket sensors
  • 300 Cell Metallic Substrate Catalytic Converter - Provides an excellent balance of reduced restriction of a ‘race cat’ compared to a 200 cell unit


    Brand: GrimmSpeed
    Includes Catalytic Converter: Yes
    Installation Hardware Included: Yes
    Piping Coating: No
    Piping Flex Joint: No
    Piping ID: 3.00in
    Piping Material: 304 Stainless Steel
    Piping Taper: No
    Tuning Required: Yes
    Mfgr. Warranty: Lifetime
    Condition: New Product
    Return Policy:
    RallySport Guarantee



    6 Reviews
    5 out of 5 Stars
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    Customer Photos and Videos
    GrimmSpeed J-Pipe 3in Catted ( Part Number: 007103)
    Best Quality J-Pipe for the price 11 months ago
    5out of 5stars
    So far I have used Cobb catted J pipe and now the Grimmspeed and holy moly the world of a difference with drivability even using OTS map at first. Now being Tuned by Eric at Torqued Performance it’s a dream driving. Gas mileage, power, and drivability is night and day. With the Grimmspeed j pipe you have a smooth all one piece design which a lot of people don’t realize eliminates a good amount of the bad smelling exhaust fumes that come from removing stock cats even when using Cobb j pipe the section that bolts up to the second pipe that goes to the exhaust eventually leaks and when turning on your heater it sucks in everything while at a stop or idling in the morning and so forth. Installing was pretty smooth being my WRX had about 12k miles just use PB Blaster and Dot 3 brake fluid trust me it’s a secret that everyone should know, then after taking off the stock j pipe installing the Grimmspeed is a piece of cake!!! But learned the hard way by purchasing Cobb’s j pipe and days later the Grimmspeed but for you readers looking into going stage 2 or stage 2+ buy the Grimmspeed and then get a E-Tune from Eric at torqued performance you won’t regret it! Guaranteed you’ll be more than satisfied. Grimmspeed for the win.
    Was this review helpful?
    Great buy 3 years ago
    5out of 5stars
    I love this downpipe. Install was easy, the hardest part was breaking the top right oem bolt on the turbo loose, other than that everything fit like a glove. I recommend this to anyone considering a j-pipe upgrade. The sound and quality is amazing.
    Was this review helpful?
    Grimmspeed J-Pipe = High quality 4 years ago
    5out of 5stars
    Mr. Means
    Grimmspeeds attention to detail makes this an amazing product. Also Grimmspeed is the preferred brand of my Tuner
    Was this review helpful?
    Incredible Part, Sounds Great 5 years ago
    5out of 5stars
    It took me a bit to line up this install and pro-tune but I got it all squared away and it sounds absolutely phenomenal. You hear your turbo spool very clearly but it's nothing too obnoxious. Install was pretty easy. Just WD-40 the turbo studs before you try to take the nuts off. I had no trouble with them stripping or cross threading. AWESOME product Grimmspeed.
    Was this review helpful?
    Love it 5 years ago
    5out of 5stars
    Great quality, bolted right on my 2018 wrx premium. Comes with all the gaskets needed and new studs and nuts for the turbo. Only difficult part was getting the oem one out.
    Was this review helpful?


    • Q: will this fit  NUNU3 years ago

      will this bolt up to the AWE TRACK EDITION EXHAUST?
    • Q: Catalytic converter location  @Ryguysti3 years ago

      In your opinion, is there any reason why some manufacturers place the catalytic converter immediately post turbo while others chose to place it more downsteeam like with this Grimmspeed unit?
      • 0 of 0 people found the following answer helpful

        A:  In theory, a cat placed further back will have less back pressure. That said, having the cat closer to the turbo will heat the catalyst more quickly and allow it to perform more efficiently, so there are benefits to both configurations.

        Marcus E. @ RallySport Direct 3 years ago  
        Was this answer helpful?
    • Q: Boost  2017 WRX AWE Exhaust3 years ago

      I read on phatbotti tuning that catted downpipes are safer and prevent boost creep. Will this downpipe prevent boost creep?
      • 0 of 0 people found the following answer helpful

        A:  Catless downpipes will only cause boost creep if tuned improperly, but this catted downpipe will be your safest bet when using OTS maps.

        Tylo R @ RallySport Direct
        Was this answer helpful?
    • Q: Fitment  Archangel4 years ago

      Will this bolt strait too the borla s type catback or what will I need for proper fitment
      • 0 of 0 people found the following answer helpful

        A:  The Borla tapers down to a stock 2.5" flange, you'll want to run a 3" downpipe to OEM catback adapter.

        Marcus E. @ RallySport Direct 3 years ago  
        Was this answer helpful?
    • Q: Fitment   16WRX5 years ago

      Will this downpipe bolt right up to an invidia r400 cat back