-5%
Click to zoom in
SKU: 42320-4 | UPC: 807298008530
Manley 3/8 ARP 625+ Bolt (Set of 4) 1955-2002 Chevy Small Block Ford 289/302/351W
Manley 42320-4 provides four 3/8"-24 x 1.500" ARP 625+ Inconel connecting rod bolts designed for Chevrolet small block 265-400 cid and Ford 289/302/351W engines. These bolts deliver 260000 psi tensile strength for reliable clamping under high boost and extreme RPM in racing or street performance engines. Engine builders choose them for consistent performance and long-term durability in demanding applications.
Key Features
- ARP 625+ Inconel Alloy: Provides 260000 psi tensile strength with superior fatigue and heat resistance for high horsepower builds
- Exact Dimensions: 3/8"-24 UNF thread 1.500" underhead length 12-point head for accurate fit torquing and rod clearance
- Black Oxide Coating: Protects against corrosion and eliminates thread galling for smooth installation and extended service life
- Pack of 4: Perfect quantity for two connecting rods in rebuilds or upgrades
- USA Made: ARP precision manufacturing ensures uniform quality and reliability
Product Notes
- Use ARP Ultra-Torque lubricant on threads and under bolt heads for accurate torque readings
- Torque to rod manufacturer specs typically 55-65 ft-lbs
- Inspect connecting rods for correct big-end bore sizing prior to installation
Installation Notes
- Professional installation recommended.
- Clean all threads and surfaces thoroughly before assembly
- Compatible with H-beam and I-beam rods designed for 3/8" ARP bolts
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1955-2002 | Chevrolet | Small Block V8 | 265-400 cid (Camaro Corvette Truck) |
| 1967-2002 | Chevrolet | Camaro | Base RS SS Z/28 |
| 1955-1991 | Chevrolet | Corvette | Base Stingray |
| 1963-1968 | Ford | 289 V8 | Mustang Falcon Fairlane |
| 1968-1995 | Ford | 302 V8 | Mustang F-100 F-150 Truck |
| 1969-1996 | Ford | 351W V8 | Mustang F-Series Bronco |
Why Choose Manley?
- Partners with ARP to supply fasteners proven in NHRA dragsters
- Offers strength trusted in high-horsepower engine projects
- Built to exact tolerances for seamless rod compatibility
Frequently Asked Questions
-
Q: Do these fit Chevy 350 small block engines?
A: Yes fits all 1955-2002 Chevrolet small block 265-400 cid engines with 3/8" rod bolts including Camaro Corvette trucks -
Q: What material and strength do ARP 625+ bolts provide?
A: Inconel-based superalloy at 260000 psi tensile strength with high heat fatigue resistance -
Q: Does this include a warranty?
A: Backed by ARP one-year unlimited mileage warranty against material workmanship defects
Shipping & Handling
- Method: UPS Ground USPS Priority Mail
- Availability: In stock - ships same or next business day
- Packaging: Compact protective box
- Weight: 0.25 lbs
Bolts
Bolts parts and accessories for engine, chassis, suspension, driveline, and exhaust projects are stocked at Black Ops Auto Works. Shop ARP bolts, stainless 12 point bolts, black oxide bolts, metric hardware, wheel bolts, flywheel bolts, main bolts, header bolts, axle bolts, ring gear bolts, fastener kits, and replacement hardware for LS, Coyote, HEMI, Ford, GM, Mopar, Porsche, and import engines. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 89 Bolts SKUs across thread, length, head style, material, finish, and application specific hardware. What This Bolts Collection Covers This collection covers automotive bolts and fastening hardware for repairs, engine assembly, chassis service, drivetrain work, exhaust installation, and wheel related service. It includes individual bolts and application specific sets across SAE and metric thread sizes. Thread, Length, and Head Style Choos...
View Bolts Products
Fabrication
Shop Fabrication Parts and Materials at Black Ops Auto Works for stainless steel tubing, titanium tubing, aluminum charge piping, mandrel bends, V-band clamps, flanges, merge collectors, AN fittings, PTFE hose kits, braided fuel and oil lines, heat shields, welding supplies, brackets, bungs, and hardware for building custom exhaust systems, turbo plumbing, intercooler piping, and fuel system routing. Start with tubing in stainless, titanium, or aluminum in the right diameter and wall thickness, then add mandrel bends, flanges, V-bands, and clamps to complete the joint work. Black Ops Auto Works carries 5,866 fabrication SKUs from Vibrant Performance, Ticon Industries, Stainless Bros, Radium Engineering, Fragola, DEI, and ATP Turbo. Why Custom Fabrication Custom fabrication solves fitment problems that no universal or pre-bent kit can address. Raw tubing, flanges, and fittings give the fabricator freedom to route exhaust around a turbo, snake charge pipe around accessories, hard-...
View Fabrication Products
Manley Performance
Manley Performance is a New Jersey-founded engine internals manufacturer stocked at Black Ops Auto Works, supplying forged pistons, connecting rods, valves, and crankshafts across domestic and import platforms. Shop Manley H-Beam and H-Tuff connecting rods, Race Master Series valves, forged crankshafts, and valve springs for Ford Modular and Coyote, Chrysler HEMI, Subaru EJ and FA, Nissan SR20 and 2JZ, Honda B and H-series, and Mitsubishi 4B11T and Mazda MZR platforms. Every product is filterable by year, make, model, and engine code so the correct part ships the first time. Black Ops Auto Works carries 270 Manley Performance SKUs across pistons, rotating assembly, and valvetrain components. About Manley Performance Founded in 1966 by Hank Manley as Manley Speed Equipment, Manley Performance has grown into one of the most established names in high-performance engine internals. From grassroots drag racing roots in New Jersey to a second manufacturing facility in Orange, Californi...
View Manley Performance Products