GrimmSpeed 3-Bolt Uppipe 38/40mm V-Band EWG + Dump Tube Subaru (incl. STi / WRX 02-13, Legacy GT)

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Pipe Finish: Brushed

w/ 3-Bolt Header (Tomei, GTSpec)

Stainless Steel; Triple Layer Flex Section; Wastegate NOT Included

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An External Wastegate (EWG) allows exhaust gases to be diverted prior to entering the turbo. This facilitates lower backpressure at the turbine, allowing for increased boost control, faster spool-up and greater top-end power. The GrimmSpeed EWG Up Pipe has a larger internal diameter than your stock unit, allowing a higher volume of exhaust gas to reach your turbo more efficiently. This helps maintain boost levels further into your RPM range. Depending on your specific setup, these improvements can net a 10-40 HP increase. An internal wastegate can create a larger amount of turbulence in exhaust flow through your turbine housing; moving to an external wastegate eliminates much of that turbulence and isolates the turbo from what little turbulence still exists as your wastegate opens and closes.

Quick Specs
  • 3-Bolt Inlet Flange fits most 3-bolt headers!
  • 321 Stainless Steel Interlocking Flex Section - Reduces fatigue and facilitates thermal expansion
  • Contoured EWG Side Outlet - CNC bent and laser cut, this EWG exit allows exhaust gas to exit with maximum efficiency
  • 2.0mm Tube Thickness - 33% Thicker than the competition
  • 1/2'' Stainless Steel CNC Flanges - Fully machined, these beefy flanges offer perfect fit and transition every time
  • 10+ WHP Gain - Ask your tuner what you can expect based on your particular setup and goals!
  • 1.85'' Inner diameter - Supports 600whp+
  • FARO Arm Designed - Allows more precise design and a stronger, better fitting product

The design of each up-pipe begins with 3D scanning of the factory exhaust system, motor, subframe, firewall and downpipe. The GrimmSpeed line of 3-bolt up-pipes also involves data collection from a number of aftermarket 3-bolt headers to ensure the best possible fitment. The 3-bolt inlet flange uses a machined 45 degree transition to smoothly narrow the ID of the up-pipe to the perfect size for your stock-location turbo. The completely redesigned interlocking flex section facilitates fitment with other aftermarket components that may not be manufactured to the same exacting specifications. Additionally, the inclusion of a flex section relieves your pre-turbo exhaust system of the stresses associated with thermal expansion and contraction.



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GrimmSpeed 3-Bolt Uppipe 38/40mm V-Band EWG + Dump Tube
Stainless Steel; Triple Layer Flex Section; Wastegate NOT Included
Subaru (incl. STi / WRX 02-13, Legacy GT)
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