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˚ª intake and 236˚ª 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.

• Displacement- 376
• Bore x stroke- 4.06 x 3.62
• Block- cast aluminum 6-bolt main caps
• Pistons- hypereutectic aluminum
• Camshaft Type- hydraulic roller
• Camshaft Lift- .525 intake/.525 exhaust
• Camshaft Duration(@.050in)- 226 intake/ 236 exhaust
• Cylinder Heads- ls3 rectangular port 68cc chambers
• Valve Size -2.16 intake/1.59exhaust
• Compression- 10.7:1
• Rocker Arms- investment cast, roller trunnion
• Rocker Arm Ratio- 1.7:1
• Recommended Fuel -92 octane
• Maximum RPM- 6600
• Balanced- internal
• Horsepower- 515
• Torque-470
  

**This part is shipped via truck freight, additional shipping charges will apply. Multiple truck freight parts on an order may increase the shipping amount.   Note: Crate engine shipping charges have two components; Commercial Delivery (Free) & Residential Charge. The commercial shipping delivery to a freight terminal or commercial address ((provided the commercial address has a forklift to unload the product). If the product is shipped to a residential address there is an additional cost of $300 for the use of a lift-gate vehicle. Please call USM (888-876-7223) for any questions.   Truck Freight:    Most Truck Freight items have two standardized shipping rates, one rate to the terminal, another to your door. Additional fees apply for lift gate service; to avoid this you can choose terminal pickup. Truck Freight:    Most Truck Freight items have two standardized shipping rates, one rate to the terminal, another to your door. Additional fees apply for lift gate service; to avoid this you can choose terminal pickup.