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Chevrolet Corvette C4 LS swap (1984–1996)

Kits listed by vendorsC41 sourced swap recipe

LS Gen III/IV swap — moderate

1984–1991 C4 Corvette LS swap with a bolt-in mount kit that keeps the factory drivetrain angle and uses an F-body style oil pan.

Recommended engine: Most Gen III/IV LS (LS1, LS2, LS3, 5.3, 6.0) with an F-body style oil pan and a low-profile intake for hood clearance (BRP) — compare LS engines & donors

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PartWhatPrice
MountsBRP Hot Rods (MuscleRods) 1984-1991 Corvette LS Conversion Kit (2 motor mounts, engine mount bolt kit, C-beam bolt kit)
LSX31 Holds factory tilt; no tunnel mods for ZF 6-speed, T56, 4L60E		$529
BRP Hot Rods, 2026-09-28		Required
Watch out for: Kit is for 1984–1991 cars. BRP: needs an F-body style oil pan and a low-profile intake for C4 hood clearance; ZF 6-speed, T56 and 4L60E fit without tunnel mods, others may need adjustment. Corvette Central's fabricated LS2/4L60E swap into a 1985 cut the L98 mount stands, notched the firewall for the driver-side head, trimmed the K-member for the LS A/C compressor, used C5 accessories, and needed a fabricated bracket because the 4L60E tail housing doesn't fit the C4 C-beam.

Required parts we've priced so far: $529 (parts only, not a full budget — engine, trans, wiring and labor are extra. Try the swap cost estimator.)

Swap kit evidence

Questions about this swap

Every LS swap also needs

An oil pan that clears

Compare GM LS pans by sump position and depth.

Accessory drive spacing

F-body, car, truck and Corvette offsets.

Fuel system sizing

Injector and pump sizing for your power goal.

A transmission

4L60E to 8HP70 behind an LS.

Sources
  1. 1984-1991 Corvette LS Conversion Kit (MuscleRods) — BRP Hot Rods
  2. LS Engine Swap for C4 Corvettes (workshop guide) — Corvette Central Tech Blog