Premium DISA Valve O-Ring Compatible with M54 & M56 Engines – Fluorosilicone Upgrade – Ref OEM Part #11617544805 Fits E46, E39, E53, E60, E83, 325i, 325Ci, 530i, X3, X5, Z4 Eliminate vacuum leaks and restore smooth engine performance with this high-performance DISA Valve O-Ring, designed specifically for M54 and M56 engines. This is not just a basic rubber gasket—our fluorosilicone O-ring offers unmatched resistance to fuel, oil, heat, and long-term wear, making it the best material choice for demanding under-hood conditions. 🔧 Product Features: Direct fitmeny for OEM Part #11617544805 – Perfect fit Compatible with DISA intake valves, no modification needed. Fluorosilicone Material = Superior Seal – Outperforms standard rubber and even Viton in fuel/oil resistance and temperature stability. Prevents Vacuum Leaks – A proper seal helps eliminate rough idle, poor fuel economy, and check engine lights related to unmetered air. Quick & Easy DIY Installation – Drop-in replacement – no trimming or special tools required. ✅ Compatible With Models: E46 – 325i, 325Ci, 330i E39 – 525i, 530i E60 – 525i, 530i E83 – X3 2.5i, 3.0i E53 – X5 3.0i Z4 – 2.5i, 3.0i Includes M54 & M56 engine variants (Please verify your engine type and DISA valve part number before purchase.) 📦 Includes: 1x Fluorosilicone DISA Valve O-Ring. Avoid common intake issues caused by worn factory gaskets. Upgrade to fluorosilicone for a longer-lasting, tighter seal that keeps your car running like it should.