Prothane 7-513 GM J-Body Upper Engine Mount Insert - Red/Black

The Prothane 7-513 is a polyurethane upper engine mount insert designed for GM J-Body vehicles. This insert slides directly into the voids of your existing OE motor mount, stiffening the engine-to-chassis connection without requiring a full mount replacement.

Factory OE motor mounts are built with intentional voids to absorb noise, vibration, and harshness (NVH). While effective for daily comfort, these voids allow excessive engine movement under hard acceleration, reducing power transfer and causing drivetrain alignment issues over time. The Prothane 7-513 fills those voids with specially formulated polyurethane, dramatically reducing engine movement and improving throttle response.

Key Features:

• Polyurethane construction — significantly more durable than factory rubber, resistant to heat, engine fluids, road salts, and general wear
• Drop-in insert design — installs directly into your existing OE motor mount housing; no full mount replacement required
• Reduces engine movement under hard acceleration for improved power transfer to the wheels
• Improves throttle response and helps reduce wheel hop
• Available in Red or Black — both colors share the same durometer (hardness); black includes a small amount of graphite to help resist squeaking
• Includes pre-lube for proper installation
• Made in the USA
• Backed by Prothane's Lifetime Warranty against defects in materials and workmanship

Installation Note: Because these inserts fill the OE mount voids, an increase in NVH (cabin vibration and engine noise) should be expected. This is a normal trade-off associated with firmer engine mounts and is widely accepted by performance-oriented drivers.