OK, i am doing a hose job for someone and he want me to change his spark plug.

He gave me some Denso Iridum plug, one is written 27 on it and the other is 31.

which one is the leading and which one is the trailing?

Oh and should they look like this, they are not like the OEM ones.

thanks a lot

puma

 

That doesn't look like a normal Denso rotary plug. Check with website of Denso before mounting it. You could damage the apex seals.

 

on their website, it is the correct part number, anyone ever installed these?

 

See my site. All the info you need is there.

 

Denso make plugs for HKS amongst many other companies...

I wouldnt use them on a rotary. We have a company over here in the UK that tried 6 HKS plugs and only 2 of them fired.

Stick with NGK's, far better for your car.

Dan

 

wow, good website, i guess i'll try them after all, if anything happens, it is not my car, he is the one responsible if something happens.

 

Aren't those like $30 each? F that.

 

yep, but he already bought them, this is why he wants to put them in, he doesn't want to have to buy an other set

i know i would not buy these but...