Top Street Performance 81100 LS-Series to GM 3-Bolt Motor Mount Adapter Plates

Upgrade your engine installation with Top Street Performance Part Number 81100 motor mount adapter plates, designed to adapt a GM LS-series engine to a GM small-block Chevy 3-bolt motor mount pattern. This bolt-on solution helps simplify LS engine swaps while maintaining compatibility with existing GM-style mounting hardware and chassis applications.

Manufactured from billet aluminum with a clear anodized finish, these adapter plates provide a durable, corrosion-resistant surface suited for demanding automotive environments. The adjustable design incorporates a 2-1/4-inch forward mount position, helping installers fine-tune engine placement for drivetrain alignment, accessory clearance, and vehicle fitment. The plates are supplied as a pair for a complete left- and right-side installation.

Top Street Performance 81100 adapters are intended for builders seeking a clean, practical way to connect an LS-series engine with GM 3-bolt small-block Chevy mounts. Their bolt-on configuration supports straightforward installation without requiring custom-fabricated engine brackets. Always verify engine, mount, oil pan, steering, transmission, and chassis clearances before installation to confirm application compatibility.

Features:

• Brand: Top Street Performance

• Part Number: 81100

• Application: Adapts GM LS-series engines to GM 3-bolt small-block Chevy motor mounts

• Design: Bolt-on, adjustable motor mount adapter plates

• Mount Position: 2-1/4 inches forward

• Material: Billet aluminum

• Finish: Clear anodized

• Quantity: Pair

• Fitment: GM LS-series to GM 3-bolt mount pattern