Denso Iridium Spark Plugs for my MR-2

[Jem]

I need a set of Denso Iridium Spark Plugs for my 1995 Toyota MR-2. The car is a UK spec normally aspirated Rev 3. Would you recommend the normal Denso Iridium Spark Plugs or the 'Tough' version?

Cheers:thumbs: