Spark Plugs

• Application: SBC/Ford Aluminum Heads
• Heat Range: Cold
• Resistor: Non-Resistor
• Hex Size: 5/8"
• Thread Reach: 0.750"
• Thread Diameter: 14mm
• Seat: Gasket
• Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted

• Application: SBC/Ford Aluminum Heads
• Heat Range: Medium-Cold
• Resistor: Non-Resistor
• Hex Size: 5/8"
• Thread Reach: 0.750"
• Thread Diameter: 14mm
• Seat: Gasket
• Tip/Gap: DiamondFire Fixed Gap Cannot Be Adjusted

• Application: SBC/Ford Aluminum Heads
• Heat Range: Medium
• Resistor: Non-Resistor
• Hex Size: 5/8"
• Thread Reach: 0.750"
• Thread Diameter: 14mm
• Seat: Gasket
• Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted

• Application: SBC Iron Head/some Ford
• Heat Range: Cold
• Resistor: Non-Resistor
• Hex Size: 5/8"
• Thread Reach: 0.460"
• Thread Diameter: 14mm
• Seat: Taper
• Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted

• Application: SBC Iron Head/some Ford
• Heat Range: Medium-Cold
• Resistor: Non-Resistor
• Hex Size: 5/8"
• Thread Reach: 0.460"
• Thread Diameter: 14mm
• Seat: Taper
• Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted

• Application: Drag Racing
• Heat Range: Cold
• Resistor: Non-Resistor
• Hex Size: 5/8"
• Thread Reach: 0.750"
• Thread Diameter: 14mm
• Seat: Gasket
• Tip/Gap: Projected-Tip DiamondFIRE Fixed Gap Cannot Be Adjusted

• Application: Drag Racing
• Heat Range: Cold
• Resistor: Non-Resistor
• Hex Size: 5/8"
• Thread Reach: 0.460"
• Thread Diameter: 14mm
• Seat: Taper
• Tip/Gap: Projected-Tip DiamondFIRE Fixed Gap Cannot Be Adjusted

• Application: Crate 602, 604, & CT 525
• Heat Range: Cold
• Resistor: Non-Resistor
• Hex Size: 5/8"
• Thread Reach: 0.708"
• Thread Diameter: 14mm
• Seat: Taper
• Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted

• Application: Crate 602, 604, & CT 525
• Heat Range: Cold
• Resistor: Non-Resistor
• Hex Size: 5/8"
• Thread Reach: 0.708"
• Thread Diameter: 14mm
• Seat: Taper
• Tip/Gap: Projected-Tip DiamondFIRE Fixed Gap Cannot Be Adjusted

• Application: Alcohol SBC/Ford Aluminum Heads
• Heat Range: Cold
• Resistor: Non-Resistor
• Hex Size: 5/8"
• Thread Reach: 0.750"
• Thread Diameter: 14mm
• Seat: Gasket
• Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted

• Application: SBC/Ford Aluminum Heads
• Resistor: Non-Resistor
• Hex Size: 5/8"
• Thread Reach: 0.750"
• Thread Diameter: 14mm
• Seat: Gasket
• Tip/Gap: Fully CNC machined shell with modified surface gap

• Application: 602 and 604 Crate
• Resistor: Resistor
• Hex Size: 5/8"
• Thread Reach: 0.708"
• Thread Diameter: 14mm
• Seat: Taper
• Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted

13/16" hex, 3/4" reach, gasket seat (hot)

13/16" hex, 3/4" reach, gasket seat (med-hot)

5/8" hex, 0.708" reach, gasket seat (med-hot)

13/16" hex, 3/4" reach, gasket seat (medium)

13/16" hex, 3/4" reach, gasket seat (medium-cold)

13/16" hex, 3/4" reach, gasket seat (cold)

13/16" hex, 3/4" reach, gasket seat

5/8" hex, 3/4" reach, gasket seat (cold)

5/8" hex, 3/4" reach, gasket seat (hot)

5/8" hex, 3/4" reach, gasket seat (medium)

5/8" hex, .460" reach, tapered seat (hot)

5/8" hex, .460" reach, tapered seat (med-hot)