Downpipe Catted – 08-14WRX / 08+STI / 05-09LGT

$545.00

SKU: BT-7091.
Category: .

Product Description

USA’s Finest Downpipe.

-Proudly made in the USA – Design, Materials and Fabrication

-Innovative 3-D Contour Flange (Limited models only)

-FARO™ Arm Designed – We are at the leading edge of new product design hardware

-Flanges Fully CNC Machined (Limited models only)

-O2 Bungs for factory sensor and aftermarket wideband AFR

-Divorced Wastegate for Optimal flow

-High-flow, 300 cell, metallic substrate catalytic converter

-GrimmSpeed Gaskets Included – A $40 Value!

A downpipe is one of the first modifications that should be done on your car, as the OEM downpipe contains two very restrictive catalytic converters. Replacing these with our single high-flow unit will dramatically improve performance potential while maintaining the use of a catalytic converter. Within our complete lineup of downpipes, you have the option to add a high-flow, 300 cell catalytic converter, fully machined and contoured flanges with beautiful brushed tubes and black ceramic coating. Whether you’re racing time attack or to work and back, we’ve got the perfect downpipe for you.

Design

downpipe-std-subaru-08-14-635x160.jpg

We use 3D scans of 10-15 OEM downpipes to identify the variances within stock parts and ensure that our fitment is perfect across the board. We then pull those scans in 3D CAD and design our downpipe with flange locations, transmission tab locations, O2 bung locations, firewall clearances and material selection in mind. Bend locations, tube lengths and divorced wastegate re-entry point are all checked for healthy flow using CFD (computational fluid dynamics) simulations in CAD. With even the largest stock location turbine outlets utilizing factory exhaust gaskets, we used a reduction process to smoothly transition from the 2.5″ turbine outlet to our 3″ downpipe material. The outlet of the downpipe has a standard 3″, 2-bolt flange that will mate up with most aftermarket catback exhaust systems and the secondary O2 bung that we’ve added will save you time and money when you decide to use a wideband O2 sensor/gauge in the future.

As engineers and enthusiasts, we take great pride in the work that we put into our design process and it shows in the finished product.

Materials

downpipe-std-subaru-08-13-635x160.jpg

Material selection is a very important, but often overlooked, part of an aftermarket exhaust system. The tubing we chose is a thick 3in, 16ga 304L Stainless Steel tubing and our meaty 1/2″ flanges will resist warping and leaks in even the most extreme environments. Stainless steel, particularly 300-series alloys, have terrific durability and corrosion resistance but are still quite cost-effective for fabrication of this type. Lower grade alloys (400 series, for example) may be more prone to corrosion over time, reducing the life and beauty of your parts while higher grade alloys introduce unnecessary cost. All flanges use a fully-machined bolt pattern to ensure very tight tolerances and flawless fitment. Each tube is CNC mandrel bent and CNC laser cut for perfectly repetitive fitment and accuracy.

The catalytic convertor that we’ve selected is custom sized and utilizes a metallic substrate for increased effectiveness, higher flow and better durability than other, lesser units. We selected a 300 cell count mantel for a perfect compromise of performance and function.

Fabrication

downpipe-std-subaru-08-15-635x160.jpg

This is where the rubber meets the road. Every single 02-07 downpipe is welded in the exact same master fixture. Our competitors build their welding fixtures around a single OEM downpipe. We build our fixtures to the average (found using the CAD data mentioned above) of a number of OEM downpipes and turbo/catback flange locations. We periodically re-check our fixtures using our FARO arm to ensure that heavy use and heat cycling don’t affect their accuracy. Each downpipe is TIG welded by one of our two expert welders, Chuck and Andrew. Don’t be fooled by shiny immitations where a robitic TIG pass has been made over a wire-fed MIG weld; real TIG welding takes the skilled hand of a true craftsman. Chuck and Andrew take the structural integrity and beauty of their work very seriously and when you handle your new GrimmSpeed downpipe, you’ll know it.

Limited Features

downpipe-std-subaru-08-16-635x160.jpg

For those looking to take the finest downpipe one step further and wring out every last ounce of performance, we offer our ‘Limited’ line of downpipes. Limited downpipes use flanges made of the very same 1/2″ 304L Stainless material, but are fully machined with recesses for each tube as well as a beautiful 3D contour to smoothly transition the irregular shape of your internal wastegate outlet into our divorced tube for tighter boost control. In addition to the machined flanges, limited downpipe tubing material has a brushed finish, for a more uniform, refined appearance.

NOTE: Once you have added our downpipe to your vehicle, you must be tuned. Replacing your factory catalytic converter sometimes causes a ‘cat converter efficiency’ check engine light. You can either use tuning to delete this CEL or you can use a mechanical fix. GrimmSpeed aftermarket downpipes modify OEM emissions control devices and are intended only for off-road racing applications.

Fitments:

  • 2008-2014 WRX
  • 2008-2016 STI
  • 2005-2009 Legacy GT (Non-VF46, Manual Trans Only)
  • 2009-2013 Forester XT

Additional information

Weight 25 lbs
Dimensions 48 x 24 x 24 in

Reviews

There are no reviews yet.

Be the first to review “Downpipe Catted – 08-14WRX / 08+STI / 05-09LGT”

Your email address will not be published. Required fields are marked *

I'm not spambot *

SATISFIED CLIENTS MAKE US HAPPY

  • “ Professional, knowledgeable and friendly. The BrenTuning team delivered excellent work and answered all of my questions. Their E-Tune service was a great experience and I would do it again. ”

    Chris Cioffari May 12, 2017
  • “ I highly recommend Bren Tuning. I've gone to see them twice with my 15' STI, first time after getting the access port and installing an intake and last week for GS downpipe, N1 cat back and of course another tune. Couldn't be happier with the results, car runs and sounds even better that I expected. ”

    Troy Cregger May 12, 2017
  • “ Had my 2010 335xi serviced here and I have nothing but good things to say about these guys. I had a lot of work done at once and it all came out perfect. Definitely recommend and you are guaranteed to be pleased with the results! ”

    Dariush Vafaee May 12, 2017
  • “ Just finished getting a e-tune on my 15 wrx and its amazing! Car runs so smooth and has so much power! I highly recommend them for anything you need for your car. I will be taking the 3 hour trip to get more work done. Customer service was great and speedy! ”

    Chris Hernandez May 12, 2017
  • “ I've been working with Bren for over a year now on my 2015 STi. It's not often I find a shop that shares my perspective when it comes to my car. Down to earth, "REAL' car-guys. They treat my car as if it were their own, and do their best to exceed my expectations every time. I also use them for maintenance on my car. Its where I prefer to bring my car, because I know nothing will be overlooked. And when track days come around , they'll be there too, to help and advise me every step of the way. I cant ask for anything more than that. ”

    Mar Salisbury May 12, 2017
  • “ Bren seriously took his time with my tune and it was absolutely amazing. Really worked hard to get it right and when I saw that dyno sheet I almost wanted to cry from joy, power curves were amazing and he ended up getting me perfectly to 337hp 337tq. I couldn't be more happy with numbers like that. Not only was the tune amazing, but the customer service. I had a 330 spot on a Friday, ran into some trouble getting there and wasn't able to arrive until 45 minutes after my appointment. I simply called them, and was told exactly this "hey man no worries we understand, get here whenever you can and we'll make sure we take care of you tonight." To me... That says it all about Bren right there. Excellent work, you've got a lifetime customer here. ”

    Jamie Pereira May 12, 2017
  • “ Had an install and protune done with Bren and the team on my 2015 WRX. Car put out absolutely stunning results! Bren really took time and patience getting the tune right. After the dyno tune he sat with me for a ride along to make sure everything was to my liking. Great team, very friendly, down to earth and professional! ”

    Vahe Keshishian May 12, 2017
  • “ Got my 2015 Wrx e-tuned by Brentuning and could not have been any better. All my questions and concerns were answered in a timely fashion along with the tuning process itself. Car is now so much more drivable with the rev hang removed, pulls much smoother, and pulls way harder all the way to redline. ”

    Perry Alpert May 12, 2017
  • “ Hands Down...The BEST Customer Service Ever. I have a Stage 2+ 2012 STi and worked with BrenTuning to have a Protune added. The car feels completely different. There is significantly less delay in response time. The boost holds much better and is a much smoother pull. I can also feel a significant gain in tongue. Their response time was incredible though. Communication was done through email and the turn around time was instantaneous, literally felt like texting. I would highly recommend BrenTuning for great work and outstanding customer service. ”

    Ben Weber May 09, 2017
Competition use only parts are clearly labeled as competition use only in the product listing page and may only be used according to the guidelines posted on our Emissions Notice to Customers in California page