The LS3 gets a big cam and carbureted intake manifold for an additional 85 horsepower!

You know that the LS3 is the hot new small-block V-8 in the GM arsenal, but you still want more. We proudly offer you the LS376/515, an upgraded LS3 that is equipped with an aggressive camshaft and GM Performance Part's exclusive carbureted intake manifold. Two simple upgrades that add up to 515 horsepower-an 85 horsepower bump over the stock LS3.

The LS3 comes fully equipped with components that only a few years ago would have been the exclusive property of race engines. The block is a rock-solid 6-bolt foundation that holds together the 4.06" bore by 3.62" stroke rotating assembly. The LS3 heads are high-flowing rectangular port aluminum castings. What separates the LS376/515 from the base LS3 is the addition of a GM Performance Parts high performance camshaft and a carbureted intake manifold.

To match the high flow rate of the LS3 cylinder heads, our GM Performance Parts engineers installed the "ASA Hot Cam" (P/N 12480110). This is a hydraulic roller camshaft that offers up .525" intake and exhaust valve lift numbers and duration @ .050" of 226° intake and 236° exhaust.

The GM Performance Part engineers coupled that aggressive camshaft and high flowing cylinder head design with our new carbureted intake manifold specific for the L92/LS3 cylinder heads (P/N 25534401). The manifold offers a dramatic increase in horsepower and a simplified installation.

GM Warranty