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Bare Engine Blocks
Whether you’re building a new engine or recovering from an under-the-hood incident you’d rather soon forget, explore our large selection of aftermarket bare...
Whether you’re building a new engine or recovering from an under-the-hood incident you’d rather soon forget, explore our large selection of aftermarket bare engine blocks to complete your new power plant project. We have V6, V8, and L4 engine block types, and bare blocks of various materials including aluminum, billet aluminum, steel, cast iron, and ductile iron. Find the perfect foundation for your Chevy, Ford, or Mopar build-up, including Chevy 350 and 454, Ford 302 and 351w, Hemi, Corvette, LS, and LSX engines. Explore Summit Racing’s vast selection today!
Whether you’re building a new engine or recovering from an under-the-hood incident you’d rather soon forget, explore our large selection of aftermarket bare engine blocks to complete your new power plant project. We have V6, V8, and L4 engine block types, and bare blocks of various materials including aluminum, billet aluminum, steel, cast iron, and ductile iron. Find the perfect foundation for your Chevy, Ford, or Mopar build-up, including Chevy 350 and 454, Ford 302 and 351w, Hemi, Corvette, LS, and LSX engines. Explore Summit Racing’s vast selection today!
Engine Block, Cast Iron, 4-Bolt Mains, 4.000 in. Diameter Bore, 1-Piece Rear Main Seal, Ford, Small Block, Each
Part Number: FMS-M6010BOSS302
Estimated Ship Date: Today
Estimated Ship Date: Today
Engine, Bare Block, Big M Sportsman, Stock/OEM, 4.50 in. Bore, Cast Iron, 4-Bolt Main, 2-Piece Rear Main Seal, Chevy, Big Block, Each
Part Number: DRT-31223444
Need It Sooner? We recommend these similar substitute parts:
BluePrint Engines GM Big Block Compatible Bare Engine Blocks BPP12110324
Not Yet Reviewed
Estimated Ship Date: Jun 18, 2026
Engine Block, Cast Iron, 4-Bolt Mains, 4.115 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each
Part Number: WRL-084130
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Engine, Bare Block, Big M Sportsman, Stock/OEM, 4.60 in. Bore, Cast Iron, 4-Bolt Main, 2-Piece Rear Main Seal, Chevy, Big Block, Each
Part Number: DRT-31223644
Not Yet Reviewed
Estimated Ship Date: Jun 29, 2026 if ordered today
Estimated Ship Date: Jun 29, 2026 if ordered today
Need It Sooner? We recommend these similar substitute parts:
Summit Racing™ SPC Big Block Chevy Engine Block SUM-150211
Not Yet Reviewed
Estimated Ship Date: Today
Engine Case, Heavy-Duty Bubble Top, Aluminum, 85.5mm Bore, 8mm Case Studs, Volkswagen, Each
Part Number: VWP-98-0451-B
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Cylinder Block, Boss 302, 8.200 in. Deck, 4.115 in. Rough Bore, Each
Part Number: FMS-M6010B302BB
Not Yet Reviewed
Estimated Ship Date: May 13, 2026 if ordered today
Estimated Ship Date: May 13, 2026 if ordered today
Engine Case, Heavy-Duty Bubble Top, Aluminum, 90.5mm Bore, 8mm Case Studs, Volkswagen, Each
Part Number: VWP-98-0453-B
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Engine Block, Vortec Roller, Cast Iron, 4-Bolt 350 Mains, 4 in. Diameter Bore, 1-Piece Rear Main Seal, Chevy Small Block, Each
Part Number: HPE-13ZB
Not Yet Reviewed
Estimated Ship Date: Tomorrow if ordered today
Estimated Ship Date: Tomorrow if ordered today
Engine Block, Aluminum, 4-Bolt Mains, 4.250 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Big Block, Each
Part Number: DRT-31264344
Not Yet Reviewed
Engine Block SBF 351, SIAM, CLEV, 9.500 x 4.125, CAST MC
Part Number: MLL-BPP12110337
Not Yet Reviewed
Estimated Ship Date: Jun 4, 2026 if ordered today
Estimated Ship Date: Jun 4, 2026 if ordered today
Engine Block, Aluminum, 4-Bolt Mains, 4.500 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Big Block, Each
Part Number: BRO-8B2000A
Not Yet Reviewed
Estimated Ship Date: May 22, 2026 if ordered today
Estimated Ship Date: May 22, 2026 if ordered today
Engine Block, Aluminum, 4-Bolt Mains, 4.500 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Big Block, Each
Part Number: BRO-8B5025
Not Yet Reviewed
Estimated Ship Date: May 22, 2026 if ordered today
Estimated Ship Date: May 22, 2026 if ordered today
Engine Block, Cast Iron, 4-Bolt Mains, 4.125 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each
Part Number: DRT-31121221
Not Yet Reviewed
Estimated Ship Date: Jun 25, 2026 if ordered today
Estimated Ship Date: Jun 25, 2026 if ordered today
Engine Block, Aluminum, 4-Bolt Mains, 4.500 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Big Block, Each
Part Number: DRT-31264444
Not Yet Reviewed
Estimated Ship Date: Jun 25, 2026 if ordered today
Estimated Ship Date: Jun 25, 2026 if ordered today
Engine Block, Aluminum, 4-Bolt Mains, 4.125 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each
Part Number: DRT-31712212
Not Yet Reviewed
Estimated Ship Date: Jun 25, 2026 if ordered today
Estimated Ship Date: Jun 25, 2026 if ordered today
Engine Bare Blocks, Dart Big M Series, Aluminum, 10.20 in. Tall Deck, 4.250 in. Bore. 4-Bolt Mains, 2 Piece Rear Main Seal, Chevy, Big Block, Each
Part Number: DRT-31264354
Not Yet Reviewed
Estimated Ship Date: Jun 25, 2026 if ordered today
Estimated Ship Date: Jun 25, 2026 if ordered today
Engine Block SBF 302, SIAM, 8.200 x 4.125, BILLET MC
Part Number: MLL-BPP12110339
Not Yet Reviewed
Engine Block SBF 351, SIAM, CLEV, 9.500 x 4.000, CAST MC
Part Number: MLL-BPP12110338
Not Yet Reviewed
Estimated Ship Date: Jun 4, 2026 if ordered today
Estimated Ship Date: Jun 4, 2026 if ordered today
Engine Block, Cast Iron, 4-Bolt Mains, 4.000 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each
Part Number: DRT-31121112
Not Yet Reviewed
Estimated Ship Date: Jun 25, 2026 if ordered today
Estimated Ship Date: Jun 25, 2026 if ordered today
Engine Block BBC, 2PC, SIAM, 10.200 x 4.500, CAST MC
Part Number: MLL-BPP12110329
Not Yet Reviewed
Estimated Ship Date: Jun 4, 2026 if ordered today
Estimated Ship Date: Jun 4, 2026 if ordered today
Engine Block BBC, 2PC, SIAM, 9.800 x 4.500, CAST MC
Part Number: MLL-BPP12110324
Not Yet Reviewed
Estimated Ship Date: Jun 18, 2026 if ordered today
Estimated Ship Date: Jun 18, 2026 if ordered today
Engine Block, Cast Iron, 4-Bolt Mains, 4.000 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each
Part Number: DRT-31122122
Not Yet Reviewed
Estimated Ship Date: Jun 25, 2026 if ordered today
Estimated Ship Date: Jun 25, 2026 if ordered today
Engine Block, Cast Iron, 400 Mains, 0.904 in. Lifter, Billet Main Caps, 4.120 in. Bore, Raised Cam, 2-Piece Rear Main Seal, Chevy, Small Block, Each
Part Number: WRL-084135RC-904
Not Yet Reviewed
Estimated Ship Date: May 11, 2026 if ordered today
Estimated Ship Date: May 11, 2026 if ordered today
Engine Block LS, SIAM, 9.240 x 4.125, BILLET MC, 4 HD BLT
Part Number: MLL-BPP12110359
Not Yet Reviewed
Estimated Ship Date: Jun 1, 2026 if ordered today
Estimated Ship Date: Jun 1, 2026 if ordered today
Engine Block BBC, 2PC, SIAM, 9.800 x 4.600, BILLET MC
Part Number: MLL-BPP12110330
Not Yet Reviewed
Estimated Ship Date: Jun 4, 2026 if ordered today
Estimated Ship Date: Jun 4, 2026 if ordered today
