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GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
 - 1 GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
 - 2 GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
 - 3 GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
 - 4 GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
 - 5 GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
 - 6 GrimmSpeed Catted J-Pipe/Downpipe | 2015+ Subaru WRX (0071XX) - Modern Automotive Performance
 - 7 https://youtu.be/8pRckF-XKEc

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GrimmSpeed

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

PART# GRI 007103
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Phone 1-888-627-3736



$ 799.00

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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 25 reviews
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D
Dalton Flemming
Easy install

The instructions made it easy. The turbo and exhaust bolts I soaked in sea foam penetrating oil the night before and the morning off which made it a lot easier to take off the stock j pipe. The sound is amazing and the quality of the welds were perfect

N
Nathan W.
Great quality and great sound

Installing the j pipe was easy, but removing the turbo studs can certainly be a chore, especially if you don’t have the right tools. Took me almost 5 hours just to remove one broken stud but otherwise the instal is very simple. The car sounds great with a invidia n1 resonated cat back, not too loud but definitely not too quiet. Also like that it comes with the turbo studs and all the gaskets you need, saves you almost $50 compared to the other j pipes. Would definitely recommend, only problem I have is that the cat is in the back of the j pipe, giving me a check engine light because the car thinks it’s missing a cat.

A
Anonymous
Awesome

Quality is great. Awesome product and fast shipping.

d
diego L Souza
Perfect

it sounds amazing with this j pipe. the installation was really bad, i had 3 bad screws on stock jpipe. after that it fit perfect. sounds amazing & its another different car. car is very aggressive now.

T
Thomas S.
The best mod I've done

This is easily the best mod I've done so far. The flutter of the turbo at idle and all through the gears at all RPMS is amazing. I still drive with the purpose of listening to it. I paired it with the ets extreme catback personally. Install isn't the easiest, but that's not a grimmspeed thing as much as it is an fa20 thing. Highly recommend having a tap and dye handy. I broke three of the four all threads/studs. But, it was well worth it!

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.

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