Denso TT Iridium SIP TwinTip Spark Plug IW20TT / 4709 Replace BPR6EIX B6EV B6EVXIntroducing 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 RangeDIMENSIONS: Height (mm): 25 Width (mm): 25 Length (mm): 85If 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.