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Grimmspeed Up Pipe 3-Bolt Inlet Subaru WRX/STI/LGT/FXT



Adding a well-design, well-built aftermarket up pipe is one of the first things you should do to your Subaru. Our ultimate goal was to make the best up pipe the aftermarket has to offer.

We designed this up pipe using our in-house FARO Arm along with the latest and greatest Solidworks CAD Software. This assures that we can offer you the most precise and best fitting up pipe for your [aftermarket] 3-bolt header on the market. Aftermarket headers are often inconsistent so we used our reverse engineering hardware/software to scan the leading 3-bolt headers to determine the range of best fitments for our aftermarket up pipe. This allows us to be very confident that your flanges will be leak free and the up pipe will fit perfectly, every time.

Our up pipe is made with the best local raw materials available. The flex joint is 321 Stainless Steel w/ an Interlocking Liner and the tubing is a heavy duty 14 Gauge 304 Stainless Steel (competitors use thinner 16 GA) that has been precisely CNC Mandrel Bent; our flanges are made out of 1/2" 304 Stainless Steel and are put through a tumbling process to smooth out the edges. The pipe is hand-welded on the inside of the flange, in addition to the outside, allowing for added strength to the finished product and a nice mating surface with optimal flow through the pipe. All fabrication is completed by our team of Certified Welders/Fabricators which ensures that each and every up pipe that comes out of our facility will handle anything you throw at it!

Quick Specs

  • Gaskets Included - Heavy Duty GrimmSpeed Gaskets
  • Flex Joint - 321 Stainless Steel "Tuned-Bellow"
  • Tubing Thickness- 14 Gauge Piping Thickness - 33% thicker than most competitors
  • Pipe to Flange Connection - Cut-Back flange allows much smoother connection. Piping is ported flush with flange so there is no step into the pipe.
  • Flanges - 1/2" 304 Stainless Steel CNC Milled - All 3 sides are milled for precise tolerances in manufacturing
  • Increased HP by ~10hp
  • Reduce turbo lag


The GrimmSpeed 3-bolt Up Pipe is designed to fit USDM Subaru EJ-Series Turbo Engines equipped with Tomei, GT-Spec and eBay replica 3-bolt headers. The official fitments for these units are:

  • 04-19 Impreza STI
  • 06-14 Impreza WRX
  • 06-08 Forester XT
  • 07-08 Baja XT
  • 07-09 Legacy GT
  • 07-09 Outback XT

Note: While the up pipe will physically fit other years of these models with the mentioned headers, replacing a factory up pipe with an aftermarket up pipe is defeating a catalytic emissions device and is considered illegal in some states:

  • 02-05 Impreza WRX
  • 04-05 Forester XT
  • 04-06 Baja XT
  • 05-06 Legacy GT
  • 05-06 Outback XT

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The car parts world is still feeling the impact from the Covid buying spree and shut down. Thanks to amazing customers like you, we are currently experiencing a high volume of orders and shipping may be delayed. DRP remains fully committed to pursuing the completion of your purchase within a reasonable manner under the current circumstances. You can always contact our customer service via email with questions, or to check for availability!

Please note: Not all orders will experience a delay, however, we want to continue to be as open and transparent as possible should you experience a longer than average order processing time. As a small business, your continued support means the world to us and your choice to shop with us has made a huge impact and we greatly appreciate you and your understanding!

This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to