LS 376/480
What's Hot?
Hot Cam!
Big EFI power
24-month GMPP warranty
The hot new small block V8 in the GM lineup is the hyper-aggressive LS3. It offers a high-revving 376-inch combination that represents generations of small block V8 development and engineering. Not only is the LS3 an amazing engine in its stock configuration, but with those high-flowing rectangular port cylinder heads, the LS3 is loaded with potential. To tap into this potential, the engineers at GM Performance Parts offer you the LS 376/480 - an LS3 with an upgraded camshaft that ups power by a whopping 50 horsepower!
The LS 376/480 comes with the same great features as the LS3 crate engine. The bottom end includes a 6-bolt aluminum block, nodular crank, high performance rods, and 10.7:1 pistons. The heads are high-flowing rectangular-port units that share their design with the amazing LS7. The same EFI intake manifold feeds the hungry engine, while 1.7:1 roller rockers work with the upgraded camshaft.
The GM Performance Parts engineers picked the LS Hot Cam (p/n 12617570) to take the LS3 to the next level. This cam specs out with .525-inch intake and exhaust valve lift. Duration (@ .050 inches) is 219? intake and 228? exhaust. This cam allows for a dramatic increase in power across the power band while still maintaining good street manners. The engine will idle and cruise just like an LS3, but the power increase is there whenever you need it.
With all of the same great components as the LS3, but with an additional 50 horsepower, the new LS 376/480 is ready, willing, and able to answer your call for a new LS crate engine.
ZZ527 - The 427 rat in a box returns to GM!
What's Hot?
430 horse
Pump gas friendly
24-month GMPP warranty
There are few engines that conjure up images of greatness like the 427 Chevy big block. New to the GM Performance Parts lineup, the ZZ427 big block crate engine brings back all of the good things that you remember about the 427 with a few modern new upgrades. With an updated cast iron block, a 9.5:1 final compression ratio, and an aggressive hydraulic roller camshaft, the ZZ427 offers you outstanding performance while still living on low octane fuel.
The legendary 427-inch big block Chevy powered some of the most storied cars in the history of the high performance automobile. This latest version holds true to that tradition, offering you a tough, 4-bolt main cast iron block with all a forged internal rotating assembly.
The top half of the engine is that same as the limited edition Anniversary 427 crate engine: oval-port heads that use 2.19-inch intake and 1.88-inch exhaust valves work with 1.7:1 aluminum roller rockers and a .510-inch intake/.540-inch exhaust camshaft. The intake is a matching, high-flow oval-port aluminum piece that gets fed the air/fuel mix from a 870 cfm carburetor. An HEI distributor, aluminum water pump, spark plug wires, and a 14-inch flexplate round out the package. Internally balanced, the ZZ427 will spin to 6000 rpm before it's time for you to shift.
The ZZ427 is an exciting trip back to one of the highpoints in the history of the Chevrolet big block. With a conservative 430 horsepower and loads of torque, it's still one of the best crate engines for just about any big block application.