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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- Qty in Cart
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- Price
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Sb 400 Main Caps 11180
MILODON
$349.95A quality main cap setup is non-negotiable for any serious Small Block Chevy build—it's the foundation that keeps your rotating assembly stable under load. These ductile iron caps are engineered for durability and precision fitment, giving you the...MIL11180- SKU:
- MIL11180
- Availability:
- Ships Same Business Day
- Weight:
- 9.35 LBS
- MFG Part #:
- 11180
$349.95Qty in Cart: 0Quantity:Price:$349.95Subtotal: -
Sbc Main Caps (350-2bolt 11150
MILODON
$349.95If you're building or rebuilding a Small Block Chevy 350, main cap integrity is non-negotiable—it's what keeps your crankshaft stable under peak cylinder pressures and sustained RPM. This ductile iron kit delivers the strength and precision you need for...MIL11150- SKU:
- MIL11150
- Availability:
- Ships Same Business Day
- Weight:
- 9.45 LBS
- MFG Part #:
- 11150
$349.95Qty in Cart: 0Quantity:Price:$349.95Subtotal: -
.021in Offset Dowel Pins Ford/Mopar 15970
LAKEWOOD
$49.95Bellhousing alignment is critical to smooth power transfer and long transmission life, and even slight runout can cause premature wear or catastrophic failure. These offset dowel pins solve a common problem when building or rebuilding Ford and Mopar...LWI15970- SKU:
- LWI15970
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- MFG Part #:
- 15970
$49.95 -
.014 Offset Dowel Pin Fr 15960LKW
LAKEWOOD
$71.19Bellhousing alignment is critical to smooth power transfer and longevity in high-performance applications. These offset dowel pins provide the precise .014-inch correction needed to dial in your bellhousing geometry and eliminate runout that can cause...LWI15960- SKU:
- LWI15960
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- MFG Part #:
- 15960LKW
$71.19 -
.007 Offset Dowel Pin Fr 15950LKW
LAKEWOOD
$60.85Bellhousing alignment is critical to smooth power transmission and extended drivetrain life. This .007 offset dowel pin corrects mounting inconsistencies that accumulate across repeated assembly and disassembly cycles, eliminating premature wear on your...LWI15950- SKU:
- LWI15950
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MFG Part #:
- 15950LKW
$60.85 -
Dowel Pins Ford & Mopar 15945
LAKEWOOD
$49.95Bellhousing alignment is critical to engine-to-transmission marriage, and even minor misalignment can cause catastrophic drivetrain failure. These dowel pins provide the precision locating surfaces your Ford or Mopar engine needs, ensuring your...LWI15945- SKU:
- LWI15945
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MFG Part #:
- 15945
$49.95 -
Dowel Pin GM Adj .014 15914LKW
LAKEWOOD
$199.95Bellhousing alignment is critical to transmission longevity and smooth power transfer in high-performance applications. This adjustable dowel pin system eliminates guesswork during engine-to-transmission coupling, ensuring precise positioning that...LWI15914- SKU:
- LWI15914
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- MFG Part #:
- 15914LKW
$199.95 -
Dowel Pin GM Adj .007 15907
LAKEWOOD
$199.95Precise bellhousing alignment is critical for smooth power delivery and longevity in high-performance engines, and misalignment can lead to drivetrain vibration and premature wear. This adjustable dowel pin set allows you to fine-tune...LWI15907- SKU:
- LWI15907
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- MFG Part #:
- 15907
$199.95 -
Chevrolet Performance Rear Main Seal Housing SBC w/1-Piece Rear Main 14088556
CHEVROLET PERFORMANCE
$182.99A quality rear main seal housing is critical to preventing catastrophic oil leaks that can compromise engine performance and reliability. This Chevrolet Performance unit delivers OEM-level precision and durability, making it the ideal choice for...GMP14088556- SKU:
- GMP14088556
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- MFG Part #:
- 14088556
$182.99 -
Ford Performance Camshaft Rear Plug Kit for Small Block Ford Engines Set of 10 M-6026-S351
FORD
$11.99Sealing the camshaft rear properly is critical to preventing oil leaks and maintaining engine integrity on any Small Block Ford build. These Ford Performance plugs deliver the corrosion resistance and secure fit you need for long-term reliability,...FRDM6026-S351- SKU:
- FRDM6026-S351
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- MFG Part #:
- M-6026-S351
$11.99 -
Ford Performance Engine Block Threaded Core Plugs 1.25" NPT Set of 6 M-6026-B302
FORD
$29.99Core plugs are a critical sealing component that's often overlooked until failure creates catastrophic coolant leaks and engine damage. These Ford Performance threaded plugs eliminate the guesswork of soft-plug installation by providing a machined,...FRDM6026-B302- SKU:
- FRDM6026-B302
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- MFG Part #:
- M-6026-B302
$29.99 -
Eagle SBF Rotating Assembly Kit - Street & Strip 16004030
EAGLE
$1,680.99Building a Street & Strip 347 small block? The Eagle SBF Rotating Assembly Kit delivers the strength you need for both boulevard cruising and track duty. This kit pairs a cast iron crank with forged pistons and I-beam rods—a proven combination that...EAG16004030- SKU:
- EAG16004030
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- KIT16004030
$1,680.99 -
Eagle SBC Rotating Assembly Kit - Competition 12029030
EAGLE
$2,783.99A competition-grade rotating assembly is the foundation of reliable, repeatable power output in high-revving small block engines. The Eagle SBC kit delivers forged strength throughout—from crank to pistons to rods—giving you the durability to push harder...EAG12029030- SKU:
- EAG12029030
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- KIT12029030
$2,783.99Qty in Cart: 0Quantity:Price:$2,783.99Subtotal: -
Eagle SBC Rotating Assembly Kit - Competition 12020040
EAGLE
$2,509.99Building a competition-grade Small Block Chevy engine demands a rotating assembly engineered for sustained high RPM and cylinder pressure—this kit delivers exactly that with forged internals throughout. The Eagle SBC Rotating Assembly gives you the...EAG12020040- SKU:
- EAG12020040
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- KIT12020040
$2,509.99 -
Eagle SBC Rotating Assembly Kit - Competition 12004060
EAGLE
$2,660.99When you're building a competition engine, the rotating assembly is your foundation—and compromises here will cost you power, reliability, and race wins. The Eagle SBC Rotating Assembly Kit delivers forged internals engineered to withstand the demands of...EAG12004060- SKU:
- EAG12004060
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- KIT12004060
$2,660.99 -
Eagle SBC Rotating Assembly Kit - Competition 12004030
EAGLE
$2,650.99Build a Small Block Chevy that delivers reliable power without compromise. This Eagle competition rotating assembly pairs forged internals with precision engineering to handle sustained high-RPM operation, making it ideal for street/strip builds and...EAG12004030- SKU:
- EAG12004030
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- KIT12004030
$2,650.99Qty in Cart: 0Quantity:Price:$2,650.99Subtotal: -
Eagle SBC Rotating Assembly Kit - Competition 12001040
EAGLE
$2,684.99The Eagle SBC Rotating Assembly Kit delivers the precision engineering and durability required for serious small-block Chevy competition builds. Forged internals throughout this 355 CID package ensure consistent power delivery and reliability under...EAG12001040- SKU:
- EAG12001040
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- KIT12001040
$2,684.99Qty in Cart: 0Quantity:Price:$2,684.99Subtotal: -
Eagle SBC Rotating Assembly Kit - Competition 12001030
EAGLE
$2,684.99A competition-grade rotating assembly is the foundation of reliable, high-output power. The Eagle SBC 12001030 pairs forged internals with proven Small Block Chevy geometry to deliver consistent performance whether you're chasing lap times or building a...EAG12001030- SKU:
- EAG12001030
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- KIT12001030
$2,684.99Qty in Cart: 0Quantity:Price:$2,684.99Subtotal: -
Dura Bond SBM Engine Hardware Finishing Kit FKP-1
DURA-BOND
$24.99When you're building or rebuilding a Small Block Mopar engine, hardware finishing is non-negotiable. This kit gives you precision-engineered fasteners and components that ensure reliable assembly and long-term durability under demanding conditions...DURFKP-1- SKU:
- DURFKP-1
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- MFG Part #:
- FKP-1
$24.99 -
Dura Bond SBF EFI Engine Hardware Finishing Kit FKF-1A
DURA-BOND
$29.99A complete engine finishing kit ensures your Small Block Ford EFI build maintains factory-correct specifications while delivering reliable performance. Rather than sourcing hardware piecemeal across multiple vendors, this Dura Bond kit consolidates...DURFKF-1A- SKU:
- DURFKF-1A
- Availability:
- Ships Same Business Day
- Weight:
- 0.43 LBS
- MFG Part #:
- FKF-1A
$29.99Qty in Cart: 0Quantity:Price:$29.99Subtotal:
