LS3 vs LS7: What's the Difference?

The GM LS3 6.2L and the GM LS7 7.0L differ in displacement, bore × stroke, compression ratio, factory rating. The table puts the factory specs side by side; each engine's own page has the full specs.

Specs side by side

	GM LS3 6.2L	GM LS7 7.0L
Engine	GM LS3 6.2L	GM LS7 7.0L
Displacement	376.1 ci (6.16 L)	427.7 ci (7.01 L)
Bore × stroke	4.065" × 3.622"	4.125" × 4.000"
Cylinders	8	8
Compression ratio	10.7:1	11:1
Factory rating	415 hp–430 hp	505 hp
Block	aluminum	aluminum
Heads	aluminum	aluminum
Rod length	6.098"	—
Deck height	9.240"	—
Weight (approx.)	—	—
Fuel	gas	gas
Model years	2008–2017	2006–2015

Where versions of an engine differ, the table shows the range across them. Ratings are the makers' published figures.

Other differences

	GM LS3 6.2L	GM LS7 7.0L
Connecting rods	Powdered metal, 6.098 in	Forged titanium, 6.067 in

Which cars got each engine

GM LS3 6.2L	Years
Chevrolet Corvette	2008–2013
Pontiac G8	2009
Chevrolet Camaro	2010–2015
Chevrolet SS	2014–2017

GM LS7 7.0L	Years
Chevrolet Corvette	2006–2013
Chevrolet Camaro	2014–2015

More

• GM LS3 6.2L specs
• GM LS7 7.0L specs
• All engine comparisons