what plugs would you guys recommend for a supercharged LQ4? Heads are 317 castings, they don't look like taper seat but I could be wrong. It's a new motor so I don't have a reference from old plugs to go by.

Thank you for the help.

 

More info would be nice. But you can start with a 6 heat range on a mild setup.

 

What ^^^ said throw some NGK TR6s in there do a couple pulls then read the plugs.

 

I've been running NGK TR6 and NGK TR6ix in the old 5.3 mill that's getting replaced. I may bump the boost up from 5 to 7psi with a pulley change if needed to hit my target HP number. When I changed them they looked pretty good so that's where I will start. If the heat range looks good I'll swap in the ix tipped after 20k miles.
Thx!