Prothane 4-1901 Motor Mount Insert Kit Firm Red 3-Mount Set

The Prothane 4-1901 is a firm-durometer polyurethane motor mount insert kit designed as a performance upgrade for FWD applications. This 3-mount combo kit includes inserts for the left, right, and front motor mounts, providing comprehensive engine stabilization across all primary mount locations.

Standard OEM motor mounts are constructed from metal with rubber-filled voids engineered to absorb vibration — a tradeoff that sacrifices performance for ride comfort. Prothane's polyurethane inserts fill those voids with a precisely formulated urethane compound that is significantly more durable than rubber and capable of handling the intense weight, heat, and pressure of performance driving. The result is a performance boost comparable to a solid motor mount, without the associated cost.

Key Features:

• 3-Mount Kit — covers left, right, and front mount positions
• Firm/Race durometer — maximum engine stabilization for performance and racing applications
• Polyurethane construction — more durable than OEM rubber; resists heat, pressure, and wear
• Red color — Prothane's standard firm/race hardness designation
• Reduces wheel hop — limits engine movement for improved hard-launch traction
• Improves shift feel — reduced drivetrain flex delivers crisper, more precise gear changes
• Insert design — installs into existing OEM mounts without full mount replacement
• Includes pre-lube — apply supplied grease at installation to prevent squeaking
• Lifetime warranty — Prothane guarantees against defects in materials and workmanship for the life of the original purchaser's vehicle

The 4-1901 is rated for race use and delivers the firm engagement needed for track or high-performance street driving. A softer street-durometer alternative is available as part number 4-1902 for those preferring reduced NVH. Made in the USA.