Engines, Blocks and Components
Circle Track Engines Blocks & Components at JJ Motorsports
Build or upgrade your circle track engine using durable blocks and precision components like deck plug kits and cylinder sleeves from JJ Motorsports. Designed for racing environments, these products are essential for a solid foundation, ensuring optimal performance and reliability in demanding IMCA, USMTS, and dirt oval conditions for late models, modifieds, and street stocks.
Shop trusted brands like Chevrolet Performance for LSX blocks, Dart for high-performance options, and Eagle for forged internals. Explore related categories such as Circle Track Engines, Complete for full assemblies or Circle Track Engines, Bare Blocks for foundational upgrades.
Top Circle Track Engines Blocks & Components
- Engine Dowel Pins GM SBC X Long Bell housing pins Motor plate Chevy Transmission – GM X-long Engine Dowel Pins 2" Long .620" OD. A must for any application running a mid-mount plate to ensure proper alignment of engine and transmission. Pair - 2 per package.
- Dressed 88869604 CT400 IMCA-Sealed 604 Chevy Crate Engine, Dynoed – Dressed version includes distributor, distributor clamp, spark plug wires, and fuel pump block off plate in addition to the GM supplied crate engine. IMCA sealed and approved for use in IMCA. Dyno-verified horsepower and torque and will include a...
- Chevrolet Performance Chevy Performance LSX Cast Iron Block - 4.185 Bore Finished 19417353 – Engine 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. The LSX Bowtie Engine Block showcases three major...
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!
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- Price
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Allstar Performance Bellhousing Dowel Pins Hollow ALL38152
ALLSTAR PERFORMANCE
$10.79Keep your drivetrain perfectly aligned with the Allstar Performance Bellhousing Dowel Pins Hollow (ALL38152) — a simple but critical component that ensures your bellhousing seats accurately every single time. Designed specifically for GM applications,...ALL38152- SKU:
- ALL38152
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MFG Part #:
- ALL38152
$10.79 -
Allstar Performance Bellhousing Dowel Pins ALL38150
ALLSTAR PERFORMANCE
$9.99Keep your bellhousing perfectly aligned and your drivetrain running like it should with the Allstar Performance Bellhousing Dowel Pins (ALL38150). Designed specifically for GM applications, these precision-machined dowel pins ensure a rock-solid,...ALL38150- SKU:
- ALL38150
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- MFG Part #:
- ALL38150
$9.99 -
Allstar Performance Rear Main Seal Adapter 86-up Pan ALL26126
ALLSTAR PERFORMANCE
$132.99Upgrade your Small Block Chevy build the right way with the Allstar Performance Rear Main Seal Adapter (ALL26126) — a must-have kit that lets you ditch that old two-piece seal setup and step up to a modern, leak-resistant one-piece design. Whether you're...ALL26126- SKU:
- ALL26126
- Availability:
- Ships Same Business Day
- Weight:
- 1.27 LBS
- MFG Part #:
- ALL26126
$132.99 -
Allstar Performance Rear Main Seal Adapter Pre-86 Pan ALL26125
ALLSTAR PERFORMANCE
$199.99Upgrade your Small Block Chevy build with confidence using the Allstar Performance Rear Main Seal Adapter (ALL26125) — the smart solution for bridging a 1-piece block with a 2-piece crank seal setup. Machined from premium billet aluminum, this adapter...ALL26125- SKU:
- ALL26125
- Availability:
- Ships Same Business Day
- Weight:
- 1.19 LBS
- MFG Part #:
- ALL26125
$199.99 -
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$5,565.19Qty in Cart: 0Quantity:Price:MSRP: $5,565.20$5,565.19Subtotal: -
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: -
Eagle SBF 208/302 Rotating Assembly KIT14006030
EAGLE
$2,680.99A rotating assembly is the heart of your engine's power delivery—and a forged crank and pistons are non-negotiable if you're pushing serious horsepower or planning extended high-RPM operation. The Eagle SBF 208/302 kit delivers the durability and...EAG14006030- SKU:
- EAG14006030
- Availability:
- Ships Same Business Day
- Weight:
- 85.00 LBS
$2,680.99 -
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 -
Eagle SBC Balanced Rotating Assembly Kit B13057E030
EAGLE
$1,769.99Building a 383 Small Block that can handle both street driving and strip duty demands a rotating assembly you can trust. This Eagle kit delivers a factory-balanced combination of cast crank, forged pistons, and I-beam rods engineered to live through...EAGB13057E030- SKU:
- EAGB13057E030
- Availability:
- Ships Same Business Day
- Weight:
- 105.00 LBS
$1,769.99 -
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: -
Dart SBC Little M Iron Block 9.025 4.000/350 31181111
DART
$3,999.99The Dart SBC Little M Iron Block gives you a solid foundation for serious small block Chevy builds without the premium price tag of aluminum alternatives. Its 4.000-inch bore and 9.025-inch deck height provide the flexibility to dial in exactly the...DRT31181111- SKU:
- DRT31181111
- Availability:
- Ships Same Business Day
- Weight:
- 180.00 LBS
$3,999.99Qty in Cart: 0Quantity:Price:$3,999.99Subtotal: -
Dart SBC SHP Iron Block - 9.025 4.000/350 31161111L
DART
$2,299.99The Dart SBC SHP Iron Block delivers the foundation your Small Block Chevy build demands—a purpose-built platform engineered for high-performance applications where reliability and precision matter. Whether you're assembling a street engine or racing...DRT31161111L- SKU:
- DRT31161111L
- Availability:
- Ships Same Business Day
- Weight:
- 215.00 LBS
$2,299.99Qty in Cart: 0Quantity:Price:$2,299.99Subtotal: -
Crate Engine - SBC 396 491HP Dressed Model BP3961CTC
BLUEPRINT ENGINES
$7,064.00When you're ready to move beyond bolt-on modifications, a purpose-built crate engine delivers the displacement, reliability, and power output that separates serious builds from amateur projects. This SBC 396 dressed crate engine arrives complete and...BPEBP3961CTC- SKU:
- BPEBP3961CTC
- Availability:
- Ships Same Business Day
- Weight:
- 525.00 LBS
$7,064.00Qty in Cart: 0Quantity:Price:$7,064.00Subtotal: -
BluePrint Crate Engine - SBC 396 491HP Base Model BP3961CT
BLUEPRINT ENGINES
$7,649.00The BluePrint SBC 396 491HP crate engine delivers serious power and reliability without the guesswork of a traditional rebuild. Every component—from the forged crankshaft and pistons to the precision-honed cast iron block—is engineered for consistency...BPEBP3961CT- SKU:
- BPEBP3961CT
- Availability:
- Ships Same Business Day
- Weight:
- 475.00 LBS
$7,649.00Qty in Cart: 0Quantity:Price:$7,649.00Subtotal:
