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SKU: 8B663A-STD
ACL Race Series Standard Size Connecting Rod Bearing Set - Chevrolet Small Block V8 305 / 350 / 400 (1967-2007)
The ACL Race Series connecting rod bearings for Chevrolet small block V8 engines (305, 350, 400) provide high-strength tri-metal construction designed for performance and race applications. Featuring a hardened steel backing, leaded bronze intermediate layer, and precision electroplated lead-indium overlay, these bearings deliver increased load capacity, better embeddability, and superior oil clearance consistency compared to OE bearings – ideal for street performance, towing, or moderate racing builds.
Key Features
- Tri-Metal Construction: Hardened steel back + copper-lead intermediate + lead-indium overlay for maximum fatigue resistance.
- Race Series Design: Increased eccentricity and crush for better oil clearance and load distribution.
- Standard Size: STD dimensions – direct replacement for factory bearings.
- Precision Tolerances: Manufactured to ±0.0001" tolerances for consistent oil clearance.
- High Load Capacity: Supports moderate to high horsepower SBC builds (up to 700+ hp with proper prep).
- Oil Groove Design: 3/4 groove in upper half for improved oil supply.
- Made in Australia: Produced by ACL to ISO 9001 quality standards.
Product Notes
- Part number: 8B663A-STD (set of 8 rod bearings – full engine set).
- Fits all small block Chevrolet V8 engines with standard journal size (2.100" rod journal).
- Compatible with 265, 283, 305, 327, 350, 383, 400, and most stroker variants using standard rod journals.
- Available in undersizes (0.010", 0.020") – contact for other sizes.
- Recommended for performance and race engines – not for stock replacement.
- Individual bearing weight approximately 45-50 grams (full set ~800g).
Installation Notes
- Direct replacement – requires engine disassembly (rods off crankshaft).
- Professional engine builder installation recommended.
- Check crankshaft journal condition and plastigage clearances during install.
- Use high-zinc engine oil or break-in additive for proper bedding.
This Part Fits
| Year | Make | Model | Engine |
|---|---|---|---|
| 1967-2007 | Chevrolet | Camaro, Corvette, Chevelle, Nova, Truck, etc. | 305 / 350 / 400 SBC V8 |
| 1967-2007 | GMC | Sierra, C/K, Suburban, etc. | 305 / 350 / 400 SBC V8 |
| Universal | Any | Small Block Chevrolet V8 | 265-400 ci with standard rod journals |
Why Choose ACL Race Series?
- Australian manufacturer with decades of motorsport heritage – trusted by engine builders worldwide.
- Race Series bearings proven in high-horsepower street and race SBC engines.
- Superior materials and tolerances vs. OE and many aftermarket brands.
Frequently Asked Questions
- Q: Are these for big end or main bearings?
- A: Connecting rod (big end) bearings – 8 pieces for full V8 set.
- Q: Do they fit 400 SBC?
- A: Yes, 400 SBC uses same rod journal size (2.100") as 350.
- Q: What oil clearance?
- A: Typically 0.0015"-0.0025" with standard crank – plastigage recommended.
Shipping & Handling
- Method: Standard ground shipping.
- Package Weight: Approximately 2–3 lbs.
- Box Dimensions (approx): 8" × 6" × 2".
ACL
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