All LS engines use a 90-degree V8 OHV architecture, but bore and stroke vary by variant. Knowing the bore and stroke is essential when ordering pistons, rings, or a replacement short block.
LS ENGINE BORE AND STROKE: LS1 / LS6: Bore: 3.898" / Stroke: 3.622" / Displacement: 5.7L (346 ci) LS2 / L76: Bore: 4.000" / Stroke: 3.622" / Displacement: 6.0L (364 ci) LS3 / L92 / L99: Bore: 4.065" / Stroke: 3.622" / Displacement: 6.2L (376 ci) LS7: Bore: 4.125" / Stroke: 4.000" / Displacement: 7.0L (427 ci) LS9 / LSA: Bore: 4.065" / Stroke: 3.622" / Displacement: 6.2L (376 ci)
NOTES: • All LS engines except the LS7 share the same 3.622" stroke — displacement differences come from changes in bore diameter. • The LS7 is the only LS with a longer stroke (4.000"), contributing to its larger 7.0L displacement. • The LS9 (supercharged Corvette ZR1) and the LSA (supercharged CTS-V, Camaro ZL1) share the same bore and stroke as the LS3/L99/L92 — the difference is the supercharger and internal components. • The L99 is the LS3 with cylinder deactivation (Active Fuel Management) added. Same bore and stroke, same block.
For help confirming the right engine or short block for your build, call 1-844-XPARTS-1 or email support@expediaparts.com.