DENSO 4705 Iridium TT Spark Plug (IKBH20TT) – 0.4mm Iridium / 0.7mm Platinum Twin-Tip, Pre-Gapped 1.0mm, 14mm Thread

The DENSO 4705 Iridium TT (IKBH20TT) spark plug is built for long-life, OE-style performance using Twin-Tip technology—a fine wire 0.4mm iridium center electrode paired with a 0.7mm needle-tip platinum ground electrode to promote strong spark energy, efficient combustion, and reliable drivability. It comes /pre-gapped at 1.0mm and is designed to deliver consistent power and fuel efficiency over a long service life (fitment varies—confirm by vehicle application). 

Key Features

• Iridium TT Twin-Tip design: Fine wire iridium center + needle-tip platinum ground electrode 
• 0.4mm iridium center electrode: Maximizes firing potential with a very small diameter tip 
• 0.7mm needle-tip ground electrode: Helps increase spark energy and reduce heat quenching 
• Long-life OE-style performance: Designed for long service intervals with strong drivability and efficiency 
• Pre-gapped: 1.0mm gap (verify OE spec for your application) 

Product Specifications

• Brand: DENSO 
• Part Number: 4705
• DENSO Plug # / Series: IKBH20TT (Iridium TT)
• Thread Size: 14 mm
• Reach: 26.5 mm (1.04")
• Hex Size: 16 mm (5/8")
• Gap (Pre-Gap): 1.0 mm
• Seat Type: Gasket / Flat
• Resistor: Yes (5000 Ω) 
• Terminal Type: Non-removable nut