and a baseline test of stock LS3 heads. It should not be overlooked that our test motor produced nearly 700 hp with those OE, as-cast cylinder heads. Along with a significant amount of airflow and ...

Combine this with a revised cylinder head that replaced the cathedral-port design with a more conventional rectangular port and you have the makings of a serious small-block. The production LS3 ...

Simply installing a set of Mast’s new 12-degree LS3 cylinder head castings along with a granny-certified 225/231-at-0.050 hydraulic cam netted a gain of 99 hp. That’s not too shabby at all for ...

We couldn't help but wonder what the LS3 would be capable of with a good set of CNC-ported stock heads. Thankfully West Coast Cylinder Heads was more than happy to comply with our wishes ...

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 ...

If the Chevrolet Corvette is known for one thing, it's speed. Speed is relative, though, and our expectations have grown over the years. Every Corvette generation has beefed up the specs, and one ...

A Step-By-Step Guide 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.

The LS3 engine has an aluminum cylinder block ... New pistons were designed for high-rpm performance. New, high-flow cylinder heads aid engine breathing and are based on the large port and valve ...