Denso TT Spark Plugs
Denso TT or twin tip spark plugs are a low cost upgrade for standard copper plugs. Only 13 parts are required in the range to replace the standard copper plugs used in over 90% of vehicles on the UK's roads. Twin Tip technology uses a metal 'pad' on the ground electrode as well as having a narrower than standard centre electrode. The electrical charge is concentrated over a smaller surface area than with a standard copper spark plug and therefore a lower voltage is required to produce a spark.
Outstanding value for money and a worthwhile upgrade. TT plugs are often cheaper than a standard copper plug and should outperform standard plugs every time.