http://www.amazon.com/Autolite-AP104...9976320&sr=8-5


and what do you people think platinum or iridium?

 

First off, why would you buy spark plugs off Amazon? Just go down to the local parts store and save shipping time and hassle (and shipping, although not sure if thats free or not).

Secondly- do you have an L36 or L67? IMO, I'd do copper plugs on a modded L67, and regular (platinum or iridium) OEM replacements on an L36.

Third, assuming the heat range on their platinum plugs is the same as their copper plugs, that's 2 heat ranges colder than stock- what modifications do you have done to warrant dropping 2 heat ranges?

 

I have a gift card for amazon lol and shipping is free, i have CAI, 3" zzp DP, res remove, and DHP custom pcm so far, soon to come 3.4 pulley. its a l67, too bad they only have 1 copper spark plug in stock, thats why i wanted to go with either platinum or iridium

 

I know its isn't recommended (and bumpin' is the best member to trust for sure), but I use autolite iridium XP104's in my L67. I have had it scanned and I am knock free.

In theory, iridiums are supposed to run hot and cause KR, so it may be better to get cheap copper cores from a parts store and save the amazon money for something better

 

first off the stock ac delcos are the ngk iridiums so getting a iridium plugs are no harm type. bumpin is right why get the plugs from a on line non- car performancs site? also if they dont fit if they send you the wrong type you will be waiting for the right ones all i am saying it is easy to get the corect and the ones you are looking for from the local auto parts store aand get a good set. i am letting you know so you wouldent be up set wasting that gift card on some thing might get to be the wrong plug for your car as in ordering the plugs and get plugs for a 302 or a 305

 

I totally agree- go down to the parts store and pick up regular copper plugs, and buy something else with your gift card. It shouldn't be much more than $10- and then you can pick up a video game or a CD or something on amazon with your gift card.

Also, I don't think I'd go to the 104's until you actually put the 3.4" pulley on. Stock heat range coppers are the 606 plugs; for your setup if you really want to do plugs now, I'd probably go with the 605 plugs (1 heat range colder than stock) since you don't really have a whole lot of mods. Once you get a 3.4" setup (especially assuming you get either headers, or rockers or something to kill the extra KR)- then the 104's might be more appropriate. But for the basic bolt ons you've got now, I kinda like the 605's better.