PKH16TT Denso Spark Plugs Twin Tip A true world first, DENSO\'s patented Twin Tip (TT) Spark Plugs feature a nickel centre and a \'twin\' protruding ground electrode with a slimmer 1.5mm diameter. This highly ignitable, durable technology achieves ignition efficiency closer to DENSO\'s premium Iridium ranges, without expensive precious metals. Aimed at drivers seeking fuel savings and reduced emissions along with responsive, reliable ignition performance, DENSO\'s TT Spark Plugs are suitable for LPG as well as petrol engines. The range is also highly consolidated: only seven part references offer enough applications to cover 80% of the top selling European cars. The above email and any files attached are confidential and may also be privileged or protected by other legal rules. If you are not the intended recipient and have received this email in error please notify the sender immediately, and delete the message from your computer; you should not copy the email or use it for any purpose, or disclose its contents to any other person: to do so may be unlawful. motorcyclesparkplugs, carsparkplugs, sparkplugcrossreference, gsparkplug are trade names of The Green Spark Plug Co Ltd.