LS Engines

LS Engine Bore & Stroke Chart

LS Engine in a Miata

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.)

LS Engine Bore & Stroke Chart

Engine SizeBoreStroke
4.8L (293 c.i.d.)3.780 in.3.268 in.
5.3L (325 c.i.d.)3.780 in.3.622 in.
5.7L (346 c.i.d.)3.898 in.3.622 in.
6.0L (364 c.i.d.)4.000 in.3.622 in.
6.2L (376 c.i.d.)4.065 in.3.622 in.
7.0L (427 c.i.d.)4.125 in. 4.000 in.

NOTE: You can find engine specs and detailed engine upgrade advice for every LS and LS-based Vortec truck engine in one place: The Definitive Guide to LS Engine Specs and LS Engine Upgrades.

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  1. Are the heads interchangeable from the 5.3 to the 6.0?

  2. James Doss says:

    They were for me.

  3. 80th 6.0

  4. can i run 6.2 liter pistons on my 2001 lq4 6.0 ,?

  5. Emmerson durst says:

    How much do itcost

  6. Will my gen v lt1 crank work in my gen Iv 6.0 steel block . I’ve got a rotating assembly out of 2015 corvette. And I have 2011 6.0 bored to 6.2 and was hoping I could use the rotating assembly will it work? Thanks

  7. Will I need to clearance an LQ4 block to install a 4″ stroke crankshaft?

  8. Stanley Gayton says:

    how does a 5.3 head give 50 more hp on a 6.0?

  9. I Would also like to know why the 5.3 heads give 50hp to a 6.0? I didnt see a reply on the question.

  10. How much can you bore a 5.3 & a 6.0?

  11. Do 706 and 862 heads have a smaller combustion chamber which raises the compression ratio

  12. Can you use 862 heads on a 5.7 liter.

  13. David Mirabito says:

    I have a 07 6.2 is the cam the same from a 5.3?

  14. Anthony Galante says:

    What ya want is a 4.8 crank in a 6.2 block with longer rods and 9.0:1 forged pistons. A nice set of ls3 heads with Good springs and lifters can get 8-9KRPM.

  15. Christopher Frost says:

    The 4.8l and 5.3l have a factory bore of 3.779”. The 6.0l has a factory bore of 4.001” . And the 4.8l stroke is 3.267” . Just an FYI

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