LS Engine Bore & Stroke Chart

LS Engines are excellent swap candidates. Here we see one getting prepped for a Mazda Miata. (Image/Summit Racing – Tom’s Turbo Garage)

If you’re rebuilding or upgrading your GM LS motor, knowing the bore and stroke of your stock Chevy LS engine is critical.

It doesn’t matter if your LS is a Gen 3 or a Gen 4. It doesn’t matter if it is cast iron or aluminum. For all LS engines with the same displacement, the bore and stroke are the same. The chart below lists the stock bore and stroke measurements.

(Summit Racing’s Brian Nutter and Paul Spurlock contributed to this article.)

Want to learn more about the LS engine family?

Check out these posts:

• LS Engines 101: An Introductory Overview of the Gen III/IV LS Engine Family
• How to Identify an LS Engine
• LS Engines Spotter’s Guides – Part 1 and Part 2
• LS Tech: How to Delete VVT or Disable AFM
• LS Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More