Brey Krause R-9228 — Anti-sub strap mount for BMW E46 M3 and Z4. Slider-following design.
The R-9228 Driver-Side Anti-Sub Strap Mount mounts directly to Brey Krause R-922x Side Mount Adapters, keeping your anti-submarine belt properly positioned as the seat slider moves. No guesswork, no awkward belt angles—the stainless steel bar follows the seat track, maintaining optimal belt geometry from full-forward to full-back.
WHAT'S IN THE KIT
Stainless steel bar with factory slider attachment
Engineered for R-922x side mounts
Moves with seat position automatically
Keeps belt length consistent across all slider positions
SPECS Fits BMW E46 3-Series (including M3) and Z4 (E85/E86). Bolts to factory OE slider. Works in concert with R-922x Side Mount Adapters (sold separately).
FAQ
Do I need the R-922x adapters? Yes. The R-9228 mounts to the R-922x Side Mount Adapter series. Order both for a complete anti-sub setup.
Can I use this without side mounts? No. This mount is engineered specifically for use with Brey Krause R-922x seat mount adapters. Using it alone will not yield proper geometry or safety.
