350 Bowtie Sportsman Bare Engine Block with 1-Piece Rear Main Seal - 12480174

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12480174
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Build the vehicle of your dreams with the Chevrolet Performance 350 Bowtie Sportsman Bare Engine Block. The engine block comes with four-bolt main bearing caps. This CNC-machined cast iron competition block supports 500 maximum horsepower. It features a 1-piece rear main seal, a rear seal adapter, tall lifter bores, a standard lifter pattern, a full water jacket (non-siamese bores),, and nodular caps. The lifter valley oil scavenging boss below the bell housing flange is present, but not drilled and tapped. The oil dipstick holes are also not drilled, and 2.000-inch O.D. (1.867-inch I.D.) bearings for all five cam bearing locations are required. The clearance between the timing drive system and the block must be checked, and tall lifter bore blocks may require machining of the block to provide clearance at the top of the lifter bores for some roller lifters. No matter what you're driving or what you're building, Chevrolet Performance has a wide range of engines, parts and other accessories to help you fulfill your project-vehicle dream.

Features:
  • 500 maximum horsepower
  • Main bearing bulkheads are 0.900-inch thick and use grade-8 bolts
  • 3.980-inch finished bore
  • 4.155-inch max bore (siamesed cylinder bores)
  • 3.750-inch max stroke
  • 3.980 - 4.155 bore range (in)
  • 350 crank JNL size
  • 196 weight (lbs.)
  • 20-degrees main bolt degree
  • 0.340-inch nominal cylinder wall thickness
  • Helps maintain the alignment of internal components
  • CNC-machined cast iron competition block features 4-bolt nodular main bearing caps (center 3 are splayed)
  • Extra-thick deck surfaces have blind-tapped bolt holes for improved head gasket sealing
  • Extra-smooth gasket surfaces for a good seal
  • Standard 9.025-inch deck height
  • +/-0.001-inch machining tolerances
  • Includes 1-piece rear main seal adapter
  • Priority main oiling system and wet oiling
  • Minimum cylinder wall bore thickness on a 4.155-inch bore is 0.225-inches

Additional Attributes

Meets or Exceeds Original Equipment Manufacture Specifications:Yes
Overall Width (in ):17.02
Overall Width (mm ):432.3
Block Casting Number:10051184
Cylinder Bore Diameter:101.092;3.98
Cylinder Quantity:8
Deck Height:229.235;9.025
Fuel Type:Gas
Grade Type:Performance
Length:553.21
Main Bearing Cap Bolt Quantity:4
Material:Cast Iron
Standard Or Reverse Rotation:Standard
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Build the vehicle of your dreams with the Chevrolet Performance 350 Bowtie Sportsman Bare Engine Block. The engine block comes with four-bolt main bearing caps. This CNC-machined cast iron competition block supports 500 maximum horsepower. It features a 1-piece rear main seal, a rear seal adapter, tall lifter bores, a standard lifter pattern, a full water jacket (non-siamese bores),, and nodular caps. The lifter valley oil scavenging boss below the bell housing flange is present, but not drilled and tapped. The oil dipstick holes are also not drilled, and 2.000-inch O.D. (1.867-inch I.D.) bearings for all five cam bearing locations are required. The clearance between the timing drive system and the block must be checked, and tall lifter bore blocks may require machining of the block to provide clearance at the top of the lifter bores for some roller lifters. No matter what you're driving or what you're building, Chevrolet Performance has a wide range of engines, parts and other accessories to help you fulfill your project-vehicle dream.

Features:
  • 500 maximum horsepower
  • Main bearing bulkheads are 0.900-inch thick and use grade-8 bolts
  • 3.980-inch finished bore
  • 4.155-inch max bore (siamesed cylinder bores)
  • 3.750-inch max stroke
  • 3.980 - 4.155 bore range (in)
  • 350 crank JNL size
  • 196 weight (lbs.)
  • 20-degrees main bolt degree
  • 0.340-inch nominal cylinder wall thickness
  • Helps maintain the alignment of internal components
  • CNC-machined cast iron competition block features 4-bolt nodular main bearing caps (center 3 are splayed)
  • Extra-thick deck surfaces have blind-tapped bolt holes for improved head gasket sealing
  • Extra-smooth gasket surfaces for a good seal
  • Standard 9.025-inch deck height
  • +/-0.001-inch machining tolerances
  • Includes 1-piece rear main seal adapter
  • Priority main oiling system and wet oiling
  • Minimum cylinder wall bore thickness on a 4.155-inch bore is 0.225-inches

Additional Attributes

Meets or Exceeds Original Equipment Manufacture Specifications:Yes
Overall Width (in ):17.02
Overall Width (mm ):432.3
Block Casting Number:10051184
Cylinder Bore Diameter:101.092;3.98
Cylinder Quantity:8
Deck Height:229.235;9.025
Fuel Type:Gas
Grade Type:Performance
Length:553.21
Main Bearing Cap Bolt Quantity:4
Material:Cast Iron
Standard Or Reverse Rotation:Standard
Type: 

Engine Block

Vendor: 

Chevrolet Performance Parts

SKU: 

12480174

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