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E90/E92/E93 · Sound

E90/E92/E93 X-pipe

Your E90/E92/E93

Pick your year to see what fits.

This page covers the US sedan, coupe and convertible. It doesn't cover the 335d diesel or the E91 wagon.

+5–15 whp (est.)
Hard$800–$1,5003–4 hrs
All E90/E92/E93 mods

Why do it

Removing the primary cats and adding an X-pipe frees up the S65 V8 and sharpens its sound at high RPM.

Heads up

Removing the primary cats isn't street legal everywhere. Check your local laws.

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.

Before you start

  • Removing the primary cats isn't street legal everywhere and can trigger a check-engine light. Check your local laws first.

Steps

  1. Remove the panels

    • Raise the car and remove the panels and braces.
    Watch this step (Evolve, on an E9X M3) (0:00–3:40)

  2. Disconnect the exhaust

    • Undo the mid-section and lower it.
    Watch this step (3:40–5:24)

  3. Prep the X-pipe

    • Prepare the new pipe and its gaskets.
    Watch this step (5:24–8:44)

  4. Install it

    • Fit the X-pipe and line it up.
    Watch this step (8:44–12:56)

  5. Secure and reassemble

    • Tighten everything and refit the panels.
    Watch this step (12:56–16:03)

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.