Cast iron block that is the same as P/N 10051183, except it has "straight" nodular four-bolt main bearing caps. It features siamesed cylinder walls for a maximum possible bore of 4.090 inches. Crankshaft main bearing bore diameter is 2.45 inc ... more info

This engine block is used in 1986-99 Gen I heavy-duty applications. It has 4.00" diameter cylinder bores and four-bolt main bearing caps. This block is machined for a one-piece rear crankshaft seal. (Does not include rear seal or adaptor.) These bloc ... more info

This is the state of the art setup for your hotrod (320 HP and 330 Torque). This (F-Car) Camaro/Firebird LS1 engine kit includes the LS1 engine complete with fuel injectors, exhaust manifolds, and flex plate. The engine features an aluminum block and ... more info

This 350ci iron bare block is used on the 1973-85 GM Goodwrench 350 engine and has the early-style 2-piece rear main seal. Its main bearing caps are the straight type four-bolt design. The block has a standard 4.00" cylinder bore. Technical Notes: Ca ... more info

CNC-machined, 3.980-inch finished bore, iron block that is identical in dimensions and features to Bowtie Sportsman block P/N 12480047, except it has a one-piece rear main seal. CAN BE BORED TO 4.155 ... more info

Our lowest priced crate engine, the 330 horsepower 350 HO doesn't sacrifice power or durability, it just pumps up the value. With its four bolt main block, nodular iron crankshaft, PM steel connecting rods and light but strong cast aluminum pistons, ... more info

CNC-machined, 4.117-inch finished bore, iron block that is identical in dimensions and features to Bowtie Sportsman block P/N 12480157, except it has a one-piece rear main seal. ... more info

CNC-machined iron block (from H-D 10051184 casting) with siamesed cylinder walls, cast nodular caps, four bolts on all five main caps (outer bolts on three center main caps are splayed 20 degrees), grade 8 bolts, priority main oiling, 9.025-inch ... more info

The 350 HO Deluxe takes the value leading 350 HO a step further by adding carburetor, distributor, water pump, torsional damper, and 12.75in 153 tooth automatic trans flexplate. This enhancement to the Vortec cylinder head 330 horsepower 350 HO mak ... more info

Similar to P/N 10105123, except the pan rails have been machined to clear a 3.80-inch stroker crank-shaft to create a 383-cubic inch engine. ... more info

With GM’s legendary Fast Burn cylinder heads and 383 cubic inches, the ZZ383/425 delivers incredible torque with smooth, linear delivery. If you're looking for a small-block package that delivers big-block power, then you’ve found it. 425 horsepower ... more info

This is a factory sealed crate engine package, complete from high rise dual plane intake manifold, stamped steel valve covers with racing style breathers, and 8 quart single kick-out circle track racing oil pan. ... more info

Great racing power at a reasonable cost. This is a factory sealed crate engine package, complete from intake manifold, stamped steel valve covers with racing style breathers, and 8 quart dual kick-out circle track racing oil pan. The ZZ4 engine is a ... more info

This is a factory sealed crate engine package, complete from intake manifold, stamped steel valve covers with racing style breathers, and 8 quart dual kick-out circle track racing oil pan. The Fast Burn 400 engine is a great value with the 1053 forge ... more info

With more ZZZ through ZZ4 crate engines sold over the years than any other high performance crate engine, it only makes sense that GMPP would continue to improve that successful family of engines. The new Fast Burn uses the proven ZZ4 shortblock and ... more info

GM Performance Parts has just what you need to put a modern twist on your favorite classic hot rod with our amazing Ram Jet 350 crate engine. GM offered the Ram Jet fuel injection system on a variety of models in the late-1950s through the mid-1960s, ... more info

A 350 that's been stepped up in power. You won't go broke finishing off your project car with our 350 HO Turn-Key crate engine! It's packed with all the features you need to get a reliable 330 horsepower and 380 lb. -ft. of torque from a dependable, ... more info

Specially tuned for torque, the all new HT 383 delivers great truck power in a small block package for your truck or street rod. With its 3.80" stroke and Vortec cylinder heads the HT 383 makes awesome torque, down low where you need it for towing or ... more info

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The HP 290/350 is GM Performance Parts' value leading crate engine, with 290 horsepower @ 5100 RPM, and 326 lb-ft of torque @ 3750 RPM on 87 octane fuel. The HP 290 horsepower will provide great long term durability with its 4-bolt mains, PM steel r ... more info

You may recall the Ram Jet brand from the GM mechanical fuel injection systems of the 50's. Back then everyone wanted a "fuelie" and today that's even more true. GM Performance Parts has brought back the Ram Jet name with its all new electronic port ... more info

Imagine an aluminum head small block that makes 355 horsepower. What if it had a steel roller camshaft, four bolt main block, undercut rolled fillet crankshaft, high silicon pistons and strong PM connecting rods? We imagined it, and then engineered, ... more info

As far as crate engines go, this one is a winner. The ZZ4 350 Turn-Key crate engine has been one of our most popular high performance crate engines since we started GM Performance Parts. Its legendary status is based on an incredible performance leve ... more info