Denso TT Iridium SIP TwinTip Spark Plug IQ20TT / 4707 Replace BCPR6EIX BCP6EV Introducing the Iridium TT Spark Plug - featuring, at 0.4mm, the worlds smallest diameter centre electrode and a 0.7mm ground electrode. This aftermarket range makes advanced OE-quality technology available to a wider range of vehicles at an affordable cost. It offers 3 times the lifetime of a Nickel plug and delivers better fuel economy and all-round optimum vehicle performance. Vastly increased endurance. Improved Ignitability Improved Output Reduced Emissions Technologically Advanced Consolidated Range DIMENSIONS: Height (mm): 25 Width (mm): 25 Length (mm): 85 If you are unsure as to whether this is the correct part for your vehicle, please don't hesitate to contact us. Alternatively please use the cross reference table above.