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981 Valved exhaust Install Guide

Your 981

Pick your year to see what fits.

This page covers the US 981.

+3–8 whp (est.)
Expert$3,999–$3,9993 hrs
All 981 mods

Why do it

Adds sound with quiet mode.

Tools you'll need

Starting out? See our budget tool list.

Parts to buy

Double-check fitment before buying. We may earn a commission when you buy through these links, at no extra cost to you.

Steps

  1. Remove the stock parts

    • Pull the undertray and exhaust support bracket.
    Watch this step (ECG Performance, on a 981, same job) (0:54–1:45)
  2. Fit the new mufflers

    • Loosely fit the new nuts, then torque them.
    Watch this step (1:45–3:01)
  3. Hook up the valves

    • Connect the vacuum lines and controller.
    Watch this step (3:01–4:21)

How to know it worked

Did this guide work for you?

Safety first

  • Park on flat ground, set the parking brake and chock the wheels.
  • Never get under a car held up only by a jack. Use jack stands.
  • Let the engine and exhaust cool first.
  • Disconnect the battery before unplugging electrical parts.
  • Wear safety glasses.
  • If something doesn't match your car, stop and ask a shop.

Follow your part's instructions and your service manual's torque specs.

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