10Pcs Racing Spark Plug Wires 10.5mm M12259C301 For Ford 5.0L 5.8L SB SBF 302

Racing Spark Plug Wires for Ford

This 10-piece racing spark plug wire set uses 10.5mm leads to carry high-voltage spark to the plugs on Ford 5.0L and 5.8L small block V8 engines, and it cross references M12259C301.

Overview

This racing spark plug wire set is made for Ford 5.0L and 5.8L small block V8 engines running stock or mild performance builds. The thicker 10.5mm leads reduce resistance and shield the spark path against heat and vibration, helping maintain consistent ignition. It suits builders of SB and SBF 302 setups who want a durable replacement wire set.

Built For Performance

• 10.5mm wire diameter for higher voltage retention than stock leads
• Cross-referenced to M12259C301 for easy lookup
• Heat-resistant insulation for high under-hood temperatures
• Ten-piece set covers both banks of a V8
• Boots grip the plug and cap terminals to resist vibration pull-off

Fits These Machines

• for Ford 5.0L small block V8
• for Ford 5.8L small block V8
• for Ford 302 small block V8
• for Ford SBF small block V8

On-The-Job Use

• Ignition refresh on a 5.0L or 5.8L V8 build
• Replacing cracked or arcing factory plug wires
• Street and strip performance setups needing reliable spark delivery

Specs At A Glance

Good To Know

Q: Do these wires come pre-assembled with boots? A: They are supplied as a set with boots fitted, so check the listing photos for the exact configuration before ordering.

Q: Will 10.5mm wires work with factory looms? A: Thicker wires may need different separators or routing than stock 7mm or 8mm leads.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.