Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededHUSHMATPART NUMBER: 774-583604
Trunk Sound Deadening and Thermal Insulation Kit for Select BMW Models
$27137
Ships on 09/09/2026
Lowest Price GuaranteeTrunk Sound Deadening and Thermal Insulation KitFits Select BMW Models See Fitment Tab for All Applications Covers Firewall, Floor, Doors, Roof, Rear Wall Butyl Rubber Compound, R-7 Rating Black/Silver Backing Sold as a Kit
Quiet down road noise and heat in the trunk of the BMW lineup with a custom-measured HushMat Ultra kit that treats firewall, floor, doors, roof, rear wall.
HushMat 583604 Trunk 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
- Fits the following applications:
- 2014-2018 BMW 320i
- 2014-2015 BMW 328i
- 2014-2015 BMW 335i
- 2016-2021 BMW 330i
- 2016-2018 BMW 340i
- 2018 BMW 318i
- 2018 BMW 330e
- 2020 BMW 320i
- 2020-2021 BMW 330e
- 2022-2026 BMW 320i
- 2022 BMW 330i
- 2023-2026 BMW 330i
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
