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Grimmspeed 44mm/45mm Up Pipe Ext Wastegate WRX 02-14 / 04-17 STi
Grimmspeed 44mm/45mm Up Pipe Ext Wastegate WRX 02-14 / 04-17 STi

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Our Price: $350.00

Product Code: 013001

Grimmspeed 44mm/45mm Up Pipe Ext Wastegate WRX 02-14 / 04-17 STi

An External Wastegate (EWG) allows exhaust gases to be diverted prior to entering the turbo; creating quicker turbo spool. The GrimmSpeed EWG has a larger diameter than a stock internal wastegate; this allows the exhaust gas to be released faster, which improves boost control, maintains maximum boost longer in the rpm range. All of these together will give you a 10-40 HP INCREASE. Moving the wastegate out of the turbo relieves the turbo from the massive amounts of turbulence that the stock internal wastegate creates.

  • Includes Up Pipe to Turbo Gasket
  • Includes Manifold to Up Pipe Gasket

Quick Facts:
  • TRIPLE LAYER Quality Flex Joint - Gives you extra durability compared to competitors single and double layer flex joints.
  • Flow through Flex - Flex isn't located on a bend so there's very minimal flow loss(if any) through the flex.
  • Curved EWG Side Outlet - Allows optimal flow to the external wastegate.
  • 2.0mm Piping Thickness - (33% thicker than all competitors!)
  • Pipe to Flange Connection - Tubes are recessed into flanges for smooth flow.
  • 1.92" Inlet = Perfect match to gasket allowing a little room for gasket movement(anything bigger, ie 2", is almost guaranteed to put gasket in the flow
  • 1.75" Outlet = Narrowing down from 1.92 to 1.75 acts as a funnel. Also very close match to most common turbos so you have much less step going into the turbo(unlike a straight through 2" which creates a huge step going into most common turbos vf's, tdo4s, etc)
  • Massive 304SS flanges
  • 10+whp gain
  • Minimal internal steps for maximum flow
  • Complete stainless steel construction(pipe, flex section, flanges)
  • Optional ceramic coating
  • Flex joint that isn't located in the bend which adds life expectancy to the flex section. many other up pipes have a flex right in a sharp bend so all the exhaust/turbulence is hitting up against it.
  • Reduce turbo lag
  • Does Not Include Wastegate

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