Engines, Bare Blocks
Circle Track Engines Bare Blocks at JJ Motorsports
Bare engine blocks are the perfect starting point for building a custom power unit tailored to your car’s needs. Designed with durability and precision, these blocks support high-power outputs for late models, modifieds, and street stocks. Combine them with additional engine-building essentials to construct a race-ready engine with confidence.
Shop trusted brands like Chevrolet Performance for LSX cast iron blocks and Dart for SHP iron options. Explore related categories such as Circle Track Engines Blocks and Components for additional parts or Circle Track Engines and Components for complete upgrades.
Top Circle Track Engines Bare Blocks
- Chevrolet Performance Chevy Performance LSX Cast Iron Block - 4.185 Bore Finished 19417353 – LSX Bare Block, 4.185 in Bore, 9.240 Deck, 6-Bolt Main, 1-Piece Seal, 6-Bolt Head, Iron, Orange, GM LS-Series, Each. Engine for high-power outputs in late models, modifieds, and street stocks.
- Chevrolet Performance Chevy Performance LSX Cast Iron Block - Semi Finish 9.260 DH 19417351 – LSX Bowtie Bare Block, 3.880 in Bore, 9.260 Deck, Iron, Orange Powder Coat, GM LS-Series, Each. Designed for maximum value and high performance in GM LS-Series engines.
- Dart SBF SHP Iron Block 4.000 Bore 9.500 DH 31375135 – SHP Bare Block, 4 in Bore, 9.500 Deck, 1-Piece Seal, Iron, Small Block Ford, Each. Built for durability and precision in circle track applications.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
Chevrolet Performance Chevy Performance LSX Cast Iron Block - 4.185 Bore Finished 19417353
CHEVROLET PERFORMANCE
$5,573.06The LSX Bowtie block is engineered for builders who demand maximum durability and oiling efficiency in high-horsepower applications. With 400 mPa tensile strength—60% stronger than previous generations—this cast iron foundation handles extreme boost...GMP19417353- SKU:
- GMP19417353
- Availability:
- Ships Same Business Day
- Weight:
- 268.00 LBS
$5,573.06 -
Chevrolet Performance Chevy Performance LSX Cast Iron Block - Semi Finish 9.260 DH 19417351
CHEVROLET PERFORMANCE
MSRP: $5,038.95$5,038.94The LSX Bowtie block is purpose-built for builders who demand race-proven engineering without the race-car price tag. Developed in collaboration with NHRA Pro Stock legend Warren Johnson, this CNC-machined cast iron foundation delivers the structural...GMP19417351- SKU:
- GMP19417351
- Availability:
- Ships Same Business Day
- Weight:
- 250.00 LBS
MSRP: $5,038.95$5,038.94 -
Dart SBF SHP Iron Block 4.000 Bore 9.500 DH 31375135
DART
$2,699.99The Dart SBF SHP Iron Block is engineered for serious Small Block Ford builders who demand a proven foundation for high-output street and race engines. This bare block delivers the strength and precision machining required to support aggressive boost...DRT31375135- SKU:
- DRT31375135
- Availability:
- Ships Same Business Day
- Weight:
- 238.00 LBS
$2,699.99Qty in Cart: 0Quantity:Price:$2,699.99Subtotal: -
Dart SBC Little M Iron Block 9.025 4.125/400 31192211
DART
$3,799.99If you're building a small block Chevy engine that needs to handle real power without breaking the bank, the Dart Little M iron block is engineered for reliability at the track or street. Its reinforced construction—extra-thick decks, Siamese cylinder...DRT31192211- SKU:
- DRT31192211
- Availability:
- Ships Same Business Day
- Weight:
- 203.00 LBS
$3,799.99Qty in Cart: 0Quantity:Price:$3,799.99Subtotal: -
Dart SBC Little M Iron Block 9.025 4.125/350 31191211
DART
$3,799.99Whether you're building a budget-friendly street engine or a competition-ready small block, the Dart Little M delivers the structural integrity and modern features you need without the premium price tag. Cast from premium Class 32B iron with extra-thick...DRT31191211- SKU:
- DRT31191211
- Availability:
- Ships Same Business Day
- Weight:
- 180.00 LBS
$3,799.99Qty in Cart: 0Quantity:Price:$3,799.99Subtotal: -
Dart SBC Little M Iron Block 9.025 4.000/350 31191111
DART
$3,799.99If you're building a street or race engine on a realistic budget, the Dart Little M iron block delivers the reliability and performance of a purpose-built platform without the premium price tag. This cast iron foundation uses standard small block Chevy...DRT31191111- SKU:
- DRT31191111
- Availability:
- Ships Same Business Day
- Weight:
- 182.00 LBS
$3,799.99Qty in Cart: 0Quantity:Price:$3,799.99Subtotal: -
Dart SBC Little M Iron Block 9.025 4.125/400 31182211
DART
$3,999.99The Dart SBC Little M Iron Block is engineered for builders who demand proven reliability without compromise. With a 4.125" bore and 9.025" deck height, this block provides the foundation for aggressive small-block Chevy builds that require structural...DRT31182211- SKU:
- DRT31182211
- Availability:
- Ships Same Business Day
- Weight:
- 238.00 LBS
$3,999.99Qty in Cart: 0Quantity:Price:$3,999.99Subtotal: -
Dart SBC Little M Iron Block 9.025 4.000/350 31181111LT
DART
$6,934.99If you're building a serious Small Block Chevy engine from the ground up, you need a foundation that won't compromise your power goals. The Dart SBC Little M Iron Block delivers the strength, precision, and flexibility required for high-horsepower...DRT31181111LT- SKU:
- DRT31181111LT
- Availability:
- Ships Same Business Day
- Weight:
- 230.00 LBS
$6,934.99 -
Dart LS Iron Block - 9.240/ 4.125 w/Steel Main Caps 31837211
DART
$4,499.99The LS platform dominates performance builds, but factory design compromises—particularly windage loss and oil control in separated crankcase bays—leave power on the table. Dart's LS Next Iron block solves these fundamental issues with a clean-sheet...DRT31837211- SKU:
- DRT31837211
- Availability:
- Ships Same Business Day
- Weight:
- 238.00 LBS
- MFG Part #:
- 31837211
$4,499.99Qty in Cart: 0Quantity:Price:$4,499.99Subtotal: -
Dart SBC Pro SHP Iron Block 9.025 4.125/400 31162212
DART
$3,799.99The Dart SBC Pro SHP Iron Block delivers the precision engineering and durability demanded by serious engine builders and high-performance racers. Built with a robust 400 main bearing platform and a proven iron construction, this block handles aggressive...DRT31162212- SKU:
- DRT31162212
- Availability:
- Ships Same Business Day
- Weight:
- 186.00 LBS
- MFG Part #:
- 31162212
$3,799.99Qty in Cart: 0Quantity:Price:$3,799.99Subtotal: -
Chevrolet Performance Chevy Performance LSX Cast Iron Block - 4.065 Bore Finished 19417352
CHEVROLET PERFORMANCE
MSRP: $5,565.20$5,565.19The Chevrolet Performance LSX Cast Iron Block is purpose-built for serious engine builders who demand maximum displacement potential and proven reliability in high-competition environments. With a 4.065" finished bore and semi-finished 9.240" deck, this...GMP19417352- SKU:
- GMP19417352
- Availability:
- Ships Same Business Day
- Weight:
- 252.00 LBS
MSRP: $5,565.20$5,565.19 -
Chevrolet Performance Alm Engine Block - Bare 6.2L LSA 12673476
CHEVROLET PERFORMANCE
$3,812.04Building a high-displacement LS platform engine demands a foundation engineered for sustained boost and cylinder pressure—this bare aluminum 6.2L LSA block delivers the structural integrity and precision you need. Whether you're constructing a...GMP12673476- SKU:
- GMP12673476
- Availability:
- Ships Same Business Day
- Weight:
- 110.00 LBS
$3,812.04Qty in Cart: 0Quantity:Price:$3,812.04Subtotal: -
Dart SBF SHP Iron Block 4.125 Bore 9.500 DH 31375235
DART
$2,699.99The Dart SBF SHP Iron Block gives you a solid foundation for building high-displacement Small Block Ford engines without compromise. With a 4.125" bore and 9.500" deck height, this bare block accepts oversized pistons and supports aggressive power builds...DRT31375235- SKU:
- DRT31375235
- Availability:
- Ships Same Business Day
- Weight:
- 204.20 LBS
$2,699.99Qty in Cart: 0Quantity:Price:$2,699.99Subtotal: -
Dart SBF SHP Iron Block 4.125 Bore 8.200 DH 31374275
DART
$2,699.99The Dart SBF SHP Iron Block is engineered for serious small-block Ford builders who demand a proven foundation for high-horsepower applications. With a 4.125" bore and 8.200" deck height, this block provides the displacement and structural integrity...DRT31374275- SKU:
- DRT31374275
- Availability:
- Ships Same Business Day
- Weight:
- 150.00 LBS
$2,699.99Qty in Cart: 0Quantity:Price:$2,699.99Subtotal: -
Dart SBF SHP Iron Block 4.000 Bore 8.200 DH 31374175
DART
$2,699.99The Dart SBF SHP Iron Block delivers the durability and precision machining required for serious Small Block Ford builds, whether you're targeting naturally aspirated peak performance or forced induction power. Built from high-quality iron with a 4.000"...DRT31374175- SKU:
- DRT31374175
- Availability:
- Ships Same Business Day
- Weight:
- 250.00 LBS
$2,699.99Qty in Cart: 0Quantity:Price:$2,699.99Subtotal: -
Dart SBC Little M Block 4.125 Bore 9.325 DH .391 RC 31182225
DART
$3,999.99The Dart SBC Little M Block is engineered for builders who demand a proven foundation for high-RPM small block applications. With a 4.125" bore and raised cam location, this block delivers the displacement and tuning flexibility serious racers need to...DRT31182225- SKU:
- DRT31182225
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
$3,999.99Qty in Cart: 0Quantity:Price:$3,999.99Subtotal: -
Dart SBC Iron Little M Block 4.125 Bore 9.025 DH 31181215
DART
$3,999.99The Dart SBC Iron Little M Block gives you a proven foundation for building serious small-block power. With a 4.125-inch bore and raised cam location, this bare block accommodates oversized pistons and modern cam profiles without compromise. Whether...DRT31181215- SKU:
- DRT31181215
- Availability:
- Ships Same Business Day
- Weight:
- 210.00 LBS
$3,999.99Qty in Cart: 0Quantity:Price:$3,999.99Subtotal: -
LS Aluminum Block - 4.120 Bore 9.240 D/H 54903U
RACING HEAD SERVICE
$6,575.95Building a high-displacement LS engine demands a foundation that can handle increased bore diameters and sustained power delivery. This aluminum LS block gives you the structural integrity and lightweight advantage you need to support aggressive builds...RHS54903U- SKU:
- RHS54903U
- Availability:
- Ships Same Business Day
- Weight:
- 140.00 LBS
$6,575.95 -
Dart LS SHP Pro Block 4.125 Bore 9.240 DH 31867212
DART
$4,699.99If you're building a serious LS platform engine for drag racing, circle track competition, or high-performance marine duty, you need a block engineered to handle extreme cylinder pressures and sustained power. The Dart SHP LS Next PRO delivers the...DRT31867212- SKU:
- DRT31867212
- Availability:
- Ships Same Business Day
- Weight:
- 240.00 LBS
$4,699.99Qty in Cart: 0Quantity:Price:$4,699.99Subtotal: -
Dart SBC Little M Iron Block 9.025 4.125/350 31181211
DART
$3,999.99Building a reliable small block Chevy platform demands a foundation engineered for precision and durability. The Dart SBC Little M Iron Block delivers a solid, proven casting that handles both street and strip applications without compromise. Whether...DRT31181211- SKU:
- DRT31181211
- Availability:
- Ships Same Business Day
- Weight:
- 255.00 LBS
$3,999.99Qty in Cart: 0Quantity:Price:$3,999.99Subtotal:
