Quick answer

Install the PLM Power Driven Subaru EWG Up Pipe with Turbosmart WG40 Gen V Wastegate by removing the factory up-pipe, fitting the new unit with fresh gaskets, and properly routing the wastegate line. This guide covers each step and the common pitfalls to avoid.

Why upgrade to an external wastegate up-pipe?

The PLM Power Driven EWG Up Pipe replaces the restrictive factory unit and integrates the Turbosmart WG40 Gen V Wastegate. External wastegates reduce turbulence in the exhaust stream, allowing quicker spool and more precise boost control. Expect 10–40+ hp gains depending on your setup and tune.

What you’ll need before starting

Have a new set of up-pipe gaskets, a torque wrench, penetrating oil, and a helper for alignment. The PLM up-pipe is a direct-fit design, but access to the lower studs can be tight. Work on a cool engine and disconnect the battery negative terminal.

Installation steps

  1. Remove the factory up-pipe: Unbolt the heat shield and the up-pipe from the exhaust manifold and turbo. Soak the studs with penetrating oil to prevent snapping. Common mistake: forcing a seized stud—use heat if needed. Replace all gaskets and studs if damaged.
  2. Prepare the PLM up-pipe and wastegate: Mount the Turbosmart WG40 Gen V Wastegate onto the PLM up-pipe using the supplied hardware. Apply anti-seize to the wastegate threads. Common mistake: overtightening the wastegate nut, which can crack the housing. Torque the wastegate nut to the manufacturer spec (usually 15–20 ft-lb).
  3. Install the new up-pipe assembly: Position the PLM up-pipe with wastegate attached into place. Start all bolts by hand before tightening to avoid cross-threading. Common mistake: not aligning the wastegate actuator arm freely—it must not bind. Tighten bolts in a criss-cross pattern to 30–35 ft-lb.
  4. Connect wastegate boost reference line: Route a vacuum line from the wastegate port to a boost source on the intake manifold or turbo compressor housing. Common mistake: using a line that is too long or too small, causing boost creep. Use 4–5 mm ID silicone line and keep it as short as possible.
  5. Recheck clearance and finalize: Spin the turbo wheel by hand to confirm no contact. Reinstall heat shield and double-check all fasteners. Common mistake: forgetting to reconnect the oxygen sensor or knock sensor. Start the engine and check for exhaust leaks with a soapy water spray.

Product facts

  • PLM Power Driven Subaru EWG Up Pipe with Turbosmart WG40 Gen V Wastegate: The PLM Power Driven Subaru EWG Up-Pipe with Turbosmart WG40 Wastegate package is hands down the best value on the market today. External wastegates allow for quicker spool because they do not cause turbulence in the exhaust stream and also give better boost control. This means you get faster turbo response and more consistent boost pressure, which translates to a stronger, safer tune.

    PLM Power Driven Subaru EWG Up Pipe with Turbosmart WG40 Gen V Wastegate

    PLM Power Driven Subaru EWG Up Pipe with Turbosmart WG40 Gen V Wastegate