[Hib Halverson]

The OP was asking about E3s. They are crap. Don't waste your money.

If budget is tight, consider the above mentioned ACDelco discount/promo price.

If you want really good spark plugs and are not too concerned about price, for the last 15 years I owned Barney, my 500-hp '95, I used the Denso IT-22 (two sets) exclusively. Great performing plug with pretty darn good plug life. I also use the IT-22 in my LS6 and LS7 engines.