ORIGINAL: bumpin96monte

No, they're stupid expensive. If you're NA, just stick with platinums like stock (unless you're really hardcore modded)- if you're boosted, stick with coppers of the proper heat range. The coppers are like $1/plug.

Your stock catback shouldn't have been that restrictive unless you're prettydecently modded. People have run 12s on stock GP catbacks. If you wanted it quiet, I would've just stuck with the stock catback- take the 2 hp hit (or whatever minor amount it is) and put all that money into more engine mods.