Fiat ones are not cheap £20 a set) so thinking of going for some Denso Iridiums instead

any thoughts?

A mate with a 306 gti-6 bought a set. He found 2bhp (RR measured) and noticed a couple mpg improvement. Although he did say the old ones were rubbish and it's entirely possibly any replacement would have done the same. Still he's happy with them.

Also, he said they're shorter than the standard plugs. No idea if that's good or bad obviously the bit that sparks is higher up in the chamber.