LS Engine Mounts for 1984-1991 Chevy Corvette
When relocating an LS V8 into a 1984 to 1991 Corvette chassis, precise engine positioning is essential and these motor mounts secure the powerplant at the exact drivetrain angle for direct OE 4L60E or 4L80E transmission fitment without altering the frame. Matching factory rail spacing and transmission crossmember dimensions preserves original weight distribution and steering feel under both cornering and heavy braking. Constructed from thick American steel plate with performance polyurethane bushings this design resists flex under sudden torque shifts while dampening vibration to keep cabin noise levels low. Complete hardware and detailed instructions enable bolt in installation using existing holes so the C4 frame integrity and resale value remain intact.
Precision Chassis Matching for C4 Corvette Installation
The engine mounts are designed to align an LS powerplant with the 1984–1991 Corvette frame rails exactly as the factory intended. By replicating original rail spacing and transmission crossmember geometry, the setup protects the Corvette’s weight distribution and steering balance when braking or cornering. This precision fit eliminates the need for frame rail trimming or tunnel modifications, preserving the structural integrity of the C4 chassis. Maintaining the stock engine angle also reduces driveline stress and keeps suspension geometry true to the factory design. The result is an installation that retains the Corvette’s characteristic feel under load while enabling a seamless LS swap with OE transmissions.
Robust Steel Brackets Built in the United States
Each mount bracket is crafted from thick American steel plate chosen for its strength and fatigue resistance under sustained torque loads. Precision TIG welding fuses the steel sections into a single rigid cradle that resists flex during sudden throttle inputs or aggressive shifts. Strict quality control in domestic production ensures each weld meets consistent penetration standards, preventing weak points where stress could concentrate. This sturdy foundation keeps the engine firmly in place, reducing U-joint and seal wear by preventing driveline misalignment. Drivers will notice a rock solid connection from engine to chassis whether cruising on the highway or pushing on track.
Polyurethane Bushings for Accurate Engine Seating and Noise Reduction
Performance polyurethane isolators replace conventional rubber to preserve shape through repeated heat and load cycles, maintaining precise engine positioning over time. The material’s inherent stiffness controls lateral movement and curbs driveline lash, yet it still absorbs shock loads that would otherwise transmit into the chassis. By damping harmful vibrations, these bushings help keep unwanted racket out of the cabin for a quieter driving experience without resorting to overly soft mounts that compromise responsiveness. Their oil and heat resistance also prevents compression set and premature wear in underhood environments. Overall, the isolators strike a balance between rigid support and effective vibration control.
Comprehensive Bolt On Kit with Detailed Guidance
The package ships with two precision-formed engine mounts, a complete set of bolts and washers, and clear installation instructions laid out step by step. Using the factory mounting holes ensures the brackets seat flush against the frame rails, maximizing load transfer and reducing installation variables. There is no need to drill, trim, or reinforce chassis components, which saves valuable shop time and preserves resale value. Whether fitting the mounts in a home garage or professional workshop, installers benefit from a streamlined process that prevents common alignment errors. The result is a straightforward LS swap experience backed by quality hardware and detailed documentation.
These motor mounts deliver precise fit and robust support for any LS swap in your C4 Corvette.