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Lock In Your Modular V8 Cam Timing For Good
ARP 256-1002 is a Pro Series M10 cam sprocket bolt kit engineered for Ford 4.6L and 5.4L Modular V8 engines running stock camshafts. Forged from 8740 chrome moly and finished in black oxide, each bolt delivers increased pre-load clamping force and a positive timing gear register so the cam sprocket stays locked in place under high rpm and repeated heat cycles. One bolt is required per camshaft, so SOHC 2V applications need two kits and DOHC 4V applications need four kits.
Key Features
- 8740 Chrome Moly Construction: Forged alloy steel resists stretch and fatigue far beyond factory torque to yield bolts
- M10 x 1.5 Thread, 190,000 PSI Pro Series: Matched thread pitch for stock cam sprockets on 2V and 4V Modular engines
- Increased Pre Load Clamping Force: Keeps the cam sprocket seated tight and prevents timing slip under load
- Oversized Bolt Head Flange: Retains the cam button securely through every duty cycle
- Reduced Socket Head Size: Fits standard sockets for straightforward removal and reinstallation
- Black Oxide Finish: Adds corrosion resistance without affecting torque values
Fitment Table
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2001-2004 | Ford | Mustang | GT |
| 2001-2003 | Ford | Mustang | SVT Cobra |
| 2001-2004 | Ford | F-150 | XLT |
| 2001-2004 | Ford | F-150 | Lariat |
| 2001-2004 | Ford | F-150 | SVT Lightning |
| 2001-2004 | Ford | Expedition | Eddie Bauer |
| 2001-2004 | Lincoln | Navigator | Luxury |
Specifications
| Detail | Value |
|---|---|
| MPN | 256-1002 |
| UPC | 672036037680 |
| Thread Size | M10 x 1.5 |
| Material | 8740 Chrome Moly |
| Tensile Strength | 190,000 PSI Pro Series |
| Finish | Black Oxide |
| Quantity Sold | Individually, one bolt per camshaft |
| Recommended Torque | 65 ft lbs with ARP Ultra Torque fastener assembly lubricant |
| Country of Origin | Made in USA |
What's Included
- ARP 256-1002 M10 cam sprocket bolt (quantity per order)
About ARP
ARP has manufactured premium fasteners for racing and high performance engines since 1968. Every bolt is forged rather than cut from bar stock, then precision machined to exceed OEM strength ratings. ARP fasteners are proven in NHRA, NASCAR, and drag racing programs where fastener failure is not an option.
Frequently Asked Questions
What is the 256-1002?
The ARP 256-1002 is a Pro Series M10 cam sprocket bolt kit for Ford 4.6L and 5.4L Modular V8 engines running stock camshafts. It replaces the factory torque to yield cam bolt with a reusable 8740 chrome moly bolt rated to 190,000 PSI.
Does this bolt kit fit both 2V and 4V Modular engines?
Yes, the M10 thread matches the stock cam sprocket bolt hole on both SOHC 2V and DOHC 4V Ford Modular engines from the 2001 to 2004 model years.
How many kits do I need for a DOHC 4V engine?
DOHC 4V engines use two camshafts per bank for a total of four camshafts, so four kits are required, one bolt per camshaft.
How many kits do I need for a SOHC 2V engine?
SOHC 2V engines use one camshaft per bank for a total of two camshafts, so two kits are required.
Will this bolt kit work with aftermarket camshafts?
This kit is designed for stock camshaft applications. Ford Modular engines running aftermarket cams typically require the ARP 256-1001 M12 bolt kit instead, so confirm your cam sprocket thread size before ordering.
What material and finish does the 256-1002 use?
Each bolt is forged from 8740 chrome moly steel and finished in black oxide for corrosion resistance without affecting installed torque values.
What torque spec should I use during installation?
Torque the bolt to 65 ft lbs using ARP Ultra Torque fastener assembly lubricant on the threads and under the bolt head, per ARP's printed instruction sheet.
What warranty covers this bolt kit?
ARP backs it with a limited lifetime warranty against manufacturing defects when the bolt is installed and torqued according to ARP's specifications.
Install Instructions
- Check the part number stamped on the instruction sheet against your application before installing
- Clean and inspect all hardware for shipping damage and confirm proper fit and length
- Apply ARP Ultra Torque fastener assembly lubricant to the threads and under the bolt head
- Install the camshaft, camshaft caps, and timing gear per the factory service manual, then thread the bolt in hand tight
- While holding the camshaft from rotating, torque the bolt to 65 ft lbs using ARP Ultra Torque lubricant
- Repeat for each additional camshaft in the engine
Prop 65 Warning
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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