Main Bearing Bolts

Select your vehicle to see Main Bearing Bolts that fit

Main Bearing Bolts for Built and Boosted Engines

Main bearing bolts clamp the main caps to the engine block. They hold the crankshaft in place and help keep the bearing bores round under load. As an engine makes more power, especially with a turbo, that clamping force matters more. Many builders replace the factory bolts with an aftermarket kit during a rebuild. The goal is a stable bottom end and more consistent torque readings during assembly.

We currently have 1 main bearing bolt product in stock, from ARP. It is the ARP Mitsubishi 2.0L (4B11) 4-Bolt Turbo Main Bolt Kit, listed for the Mitsubishi 4B11 engine.

A few things to check before you order:

  • Confirm the kit matches your exact engine code and main cap layout.
  • Follow the fastener maker's torque values and lubricant instructions.
  • Ask your machine shop whether the block should be checked or line honed after changing main fasteners.
  • Plan the bolt swap alongside any other bottom-end work so the engine only comes apart once.

To see if this kit fits your engine, pick your vehicle and we will show you what fits.

Main Bearing Bolts for Built and Boosted Engines

Main bearing bolts clamp the main caps to the engine block. They hold the crankshaft in place and help keep the bearing bores round under load. As an engine makes more power, especially with a turbo, that clamping force matters more. Many builders replace the factory bolts with an aftermarket kit during a rebuild. The goal is a stable bottom end and more consistent torque readings during assembly.

We currently have 1 main bearing bolt product in stock, from ARP. It is the ARP Mitsubishi 2.0L (4B11) 4-Bolt Turbo Main Bolt Kit, listed for the Mitsubishi 4B11 engine.

A few things to check before you order:

  • Confirm the kit matches your exact engine code and main cap layout.
  • Follow the fastener maker's torque values and lubricant instructions.
  • Ask your machine shop whether the block should be checked or line honed after changing main fasteners.
  • Plan the bolt swap alongside any other bottom-end work so the engine only comes apart once.

To see if this kit fits your engine, pick your vehicle and we will show you what fits.