Prothane 7-520-BL LS1 Motor Mount Adapter Kit Type B Tall/Narrow Black Urethane

The Prothane 7-520-BL is a Type B (Tall/Narrow) LS1 motor mount adapter kit engineered specifically for LS-series engine swaps where the factory mounts do not align with the proper frame location. This complete conversion kit bridges the gap between LS engine geometry and the original chassis mounting points, reducing drivetrain movement and maximizing power transfer to the wheels.

Key Features:

• Fully machined 6061 T6 billet aluminum adapter plates for maximum strength and precision fitment
• High-performance interlocked polyurethane motor mounts — the internal interlock design limits motor travel and reduces the risk of mount failure under hard acceleration
• Type B — Tall/Narrow profile (compare to Type A Short/Wide, part 7-519) for specific chassis clearance requirements
• Black polyurethane finish provides an OE-like appearance; black urethane contains a small amount of graphite to help resist squeaking
• Complete hardware included — all mounting fasteners necessary for installation are provided in the kit
• Limits engine movement to put more power to the wheels and reduce drivetrain flex
• Designed and tested by performance enthusiast engineers
• Made in the USA

Kit Includes:

• 2 × Prothane Tall/Narrow high-performance polyurethane motor mounts
• 2 × Machined 6061 T6 billet aluminum adapter plates
• All necessary installation hardware

Installation Note: When performing an LS engine swap using this conversion kit, relocation of the transmission mount forward may be required depending on the application.