Interior and Accessories› Sound Deadening Material

Hushmat

DOOR CUSTOM INSULATION KIT POLYMER BLACK BACKING SILVER

$207.65

SKU: H018 617303

In Stock
In Stock
Ships by Jun 15
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The HushMat 617303 is a custom door sound deadening and insulation kit designed for the 1954-1956 Cadillac 70 Series Sedan. This kit helps reduce interior noise levels by up to 15 decibels, making for a more comfortable and quieter driving experience. It effectively minimizes road noise, exhaust noise, and vibrations from the doors.
HushMat Ultra features a proprietary adhesive technology for a simple peel-and-stick application, requiring no special tools or harmful chemical cleaners. The material is self-extinguishing and tested per FMVSS 302.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandHushmat
Part NumberH018 617303

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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