The MAD Resonator Delete Kit transforms the exhaust note of your F97 X3M or F98 X4M into a bold, aggressive tone that perfectly matches the S58. It removes the restrictive factory resonator and replaces it with 76mm T304 stainless steel tubing and a precision-engineered X-pipe.

The X-pipe balances exhaust flow and smooths out irregularities for a refined, consistent tone — bold under acceleration, smooth while cruising.

Features

• 76mm T304 stainless steel tubing with a precision X-pipe.
• TIG-welded, back-purged construction for long-lasting reliability.
• Richer, deeper exhaust note — aggressive under acceleration, drone-free at cruise with the stock exhaust.
• Straightforward installation for DIYers and professionals alike.

Fitment

• 2019–2022 BMW X3M & X3M Competition (F97)
• 2019–2022 BMW X4M & X4M Competition (F98)

Ships from our Vancouver shop — KORE SPEED is proudly Canadian-owned, with no surprise cross-border duties for Canadian buyers. Questions on fitment? Email support@korespeed.com.