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Vehicle Info NeededHUSHMATPART NUMBER: 774-585302
Firewall Sound Deadening and Thermal Insulation Kit for Select BMW M850i xDrive
$19926
Ships on Sep 04, 2026
Lowest Price GuaranteeFirewall Sound Deadening and Thermal Insulation KitFits Select BMW M850i xDrive Covers Firewall, Floor, Doors, Roof, Rear Wall Butyl Rubber Compound, R-7 Rating Black/Silver Backing Sold as a Kit
Block engine and exhaust heat and noise from the cabin of the BMW M850i xDrive with a custom-measured HushMat Ultra firewall kit that covers firewall, floor, doors, roof, rear wall.
HushMat 585302 Firewall Sound Deadening Kit Features:
- Covers Firewall, Floor, Doors, Roof, Rear Wall
- Butyl Rubber Compound construction with an R-7 thermal insulation rating
- Black/Silver finish
- Withstands bakes up to 240 deg C (464 deg F) without sagging or losing adhesion
- Self-adhesive peel-and-stick application, no separate tools or adhesive required
- Sold as a complete kit
Part TypeThermal Acoustic Insulation
BrandHUSHMAT
Package Width12 in
Package Length23 in
Part CategoryPerformance Parts
R-Value7
Cold Flexibility-30 deg C without Cracking
ColorBlack Polymer / Silver Backing
QuantitySold as a Kit
MaterialButyl Rubber Compound
CoverageFirewall, Floor, Doors, Roof, Rear Wall
Hardness6.5-9.0 mm (ASTM D-5)
Thickness1.5 mm
ReusableNo
Cutting RequiredYes
Temperature Resistance464 deg F (1 hr Bake, No Deformation)
FlammabilitySelf-Extinguishing per FMVSS 302
Additional Adhesive RequiredNo
Shelf Life12 Months Minimum, Stored Below 40 deg C
SafetyNot Considered a Hazardous Material
Part FitmentDirect Fit
Specific Gravity1.47 (0.47 lb per sq ft)
Package Qty1
No Questions
No Reviews
Some parts are not legal for use in California or other states with similar laws / regulations
