LS swap checklist
Every part a typical LS swap needs. Print it, take it to the junkyard, and check things off. Use the calculator to price your exact build.
Engine & bottom end
- Engine (pull-out or junkyard; hear it run first)
- Rear main seal, oil pan gasket, timing cover seal
- Swap oil pan and pickup that clear your crossmember
- Spark plugs and plug wires
- AFM delete kit or VVT lockout (if your engine has them and you change the cam)
Mounting
- Swap engine mounts or adapter plates
- Transmission crossmember or mount
- Grade 8 mount and bellhousing bolts
Transmission & driveline
- Transmission matched to your torque
- Automatic: flexplate, converter bolts, crank spacer
- Manual: clutch, flywheel, pilot bearing, hydraulic release
- Driveshaft shortened or lengthened to fit
- Shifter and trans cooler lines
Fuel
- Fuel pump sized for your power (LS wants about 58 psi)
- Fuel filter / regulator
- LS fuel rail to -6AN or hose adapters
- Injectors and plug adapters if you upgrade
Exhaust
- Swap headers or manifolds
- Exhaust pipes, clamps or welding
- Header and manifold gaskets
- O2 sensor bungs and extension harness
Wiring & electronics
- Standalone harness or reworked factory harness
- Computer (PCM) matched to 24x or 58x
- Throttle pedal (drive-by-wire) or cable bracket
- Gauge adapters for oil pressure and coolant temp
- Tune
Cooling & accessories
- Radiator and electric fans
- Coolant hoses and steam tube kit
- Accessory brackets, belt and tensioner
- Power steering lines and AC lines (if keeping AC)
Install day
- Engine oil, coolant, transmission fluid
- Engine hoist and leveler
- Thread locker, RTV, assembly lube
- Zip ties, loom and heat sleeve
Buying used
- Hear the engine run, or get a video of it runningAsk for mileage and pull a plug to look at it.
- Check the oil for milkiness and the coolant for oil
- Transmission fluid should be red and not smell burnt
- Always buy new: gaskets, head bolts, seals, fuel pump