Since our last Ultimate LS Cylinder Head Test was such a success, we decided to up the ante a little bit and test a few LS3/L92 rectangle-port cylinder heads on a 468ci enigne. Only at www.hotrod ...

LS3 Cylinder Head, Cam, and Intake Swap - Crate LS3 Throw Down. Eeking 108 Extra Horsepower out of a Crate LS3 with a Cylinder Head, Cam, and Intake Swap. HOT ROD Staff Writer Oct 17, 2011.

With a cam and cylinder head swap we take this stock LS3 crate engine above and beyond with some serious horsepower gain. Only at www.carcraft.com, the official website for Car Craft Magazine.

We tap into the potential of the LS3 engine by testing out West Coast Cylinder Heads on a 2009 Chevrolet Corvette C6. We get a 36 hp and 30 lb-ft gain from this cylinder head swap. Only at www ...

They also both use an aluminum block and L92/LS3 cylinder heads. While both the LS3 and LSA make use of higher-flow rectangular port heads, compared to cathedral port heads found on earlier Gen ...

Both the LS3 and L99 were built on the fourth-generation GM small block architecture. Both engines are 6.2-liter pushrod V8s that use Gen IV rectangular port cylinder heads.

Both the LS3 and L99 were built on the fourth-generation GM small block architecture. Both engines are 6.2-liter pushrod V8s that use Gen IV rectangular port cylinder heads.