NGK BPR5EP-11 3971 Laser Platinum Spark Plug / Sparkplug Dual Electrodes. This spark plug is a single unit. Technical Data: Brand: NGK Quantity: 1 Unit Part Number: 3971 Other Part Number: BPR5EP-11 Thread Size: M14 x 1,25 Spanner Size: 20,8 mm Thread Length: 19.0 mm Spark Position: 4.0 mm Spark Plug Type: Platinum Middle Electrode, 1 - Earthed Electrode, interference Suppression 5 kOhm, with gasket seat, Fixed SAE connector. Cross references: DENSO: 3004, 3239, P 16 R 13, P 3, P 54, P16R Compatible with OEM references: DAIHATSU: 901901116000, 9091901115000, 9091901116000 LEXUS: 9009899203, 9091901115, 9091901116, 9091901133, 9091901134, 9091901143, 9091901144 TOYOTA: 9009899203, 9091901115, 9091901116, 9091901133, 9091901134, 9091901143, 9091901144