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How to LS swap a Jeep Wrangler JK: parts list and steps

JK LS swaps are fabrication-level work. The sourced example is GenRight Off Road's JK Elite LS engine and 4L80 transmission mounts ($799.99):

  • Engine block plates and two frame-side engine mounts with hard urethane isolators.
  • The mounts shift the engine toward the passenger side to clear the upper front link and front axle at full bump.
  • A 4L80 transmission mount with an Atlas transfer-case support bracket, which is welded on at install to match your T-case clocking.
  • Install requires cutting the factory mounts, grinding and welding.
  • The kit is made for use with GenRight's complete JK Elite suspension system.

GenRight also offers an LS accessory bracket kit (GM alternator and power steering pump), a Griffin LS radiator, an aluminum oil pan with remote-filter routing, an aFe intake, and LS headers (not California smog legal).

For the engine side, see 4L80E behind an LS, the fuel calculator and the JK swap page.

Confidence: medium — sources disagree or are limited; check the sources below.

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