I bought mine at Advance Auto -- they stock them.
http://shop.advanceautoparts.com/web..._1154373855___

Looks like they may have changed part #s?

http://www.densoiridium.com/find_part.php?tab=1
1999 CHEVROLET CAMARO 3.8L (V6) IT16 Iridium Power


Odd, I just checked my receipt and I got the 5325 too (IT16) -- hrmm -- so maybe the IT20 is a colder heat range from the IT16 -- will have to phone Denso to get the answers... Grrr. LOL

Since I am not upto 75-100 HP over stock yet -- the IT16's should be fine for me for a while.

 

Making sure just the last time before i purchase them these are the ones you're talking about right?:

http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_Iridium-Spark-Plug-Denso_20650525-P_960_R|GRPTUNEAMS_1154372008___

 

So which wires should i take from that website which would go well with the purchased spark plugs?

 

More to the story -- looks like I wrongly assume the store provided me IT20s -- caveat emptor! They are working fine so far, however.

http://www.densoiridium.com/faq.php

Q. Why are there different heat ranges? Which one should I use?
A. Part of your spark plug’s responsibilities, in addition to firing a spark, is to remove heat from the combustion chamber. This is accomplished by channeling the heat through the insulator material and metal housing. From there, the heat is transferred to the cylinder head where the engine cooling system can go to work. A spark plug’s heat range is its ability to dissipate heat. The “colder” the plug, the more heat it can channel out of the combustion chamber. In a performance application, colder heat ranges may be necessary to handle the extreme temperatures brought on by higher compression ratios, forced induction, and high RPM’s. While “Colder” plugs may seem to be the way to go, please remember that the spark plug must achieve its “self-cleaning” temperature where it can burn off fuel and carbon deposits. Otherwise, the plug could “foul out” where it is prone to misfiring and poor acceleration. A plug that is too “hot” can overheat, also causing power loss, detonation, pre-ignition, and possible engine damage. A good, general rule of thumb is to start with the factory recommended heat range. For every 75 to 100 hp you add to your engine, you may go to the next colder step. DENSO heat ranges move up as they get colder; 16 would be our hottest Iridium Power plug, 34 would be our coldest (ranges; 16,20,22,24,27,31,34)


So if you're not adding a large amount of power (75+ HP) like that article I first referenced, the IT16 should be fine for now...

 

I did the MSD 8.5mm wires from Jegs -- good price and fast shipping.

 

Yes. That is what I am actually running -- 5325 is the IT16.

 

Thanks a lot libertyforall1776 for all your help you're like a camaro guru and I'm glad to have people like you on this forum helping newbies like me. Thanks Again!

 

One last question I've found these ssparkplugs on the website they're the right ones agree?: http://www.jegs.com/i/MSD+Ignition/121/32799/10002/-1

 

It also says coil wire not included can you explain whats that for and do I need to purchase it?

 

You have 6 coil wires... Distributorless ignition does not have a seporate coil wire.

Liberty: I dont mean to sound like I am arguing with you but the plugs I pulled out of my dead engine were NGK made plugs. They had AC Delco on the top of the ceramic, an NGK style part number below that (not the 8 digit AC number) and then the NGK style lettering below that. Also on the metal housing there was the same NGK part number. The plugs looked exactly like a NGK Iridium plug that I sell at O'reilly's but with AC Delco on the top. My wife's car had Denso Iridium plugs in it (hers is a 2000 LS1) as did my friend's RS/SS which has a 2000 LS1 SLP engine in it as well, and my 2004 Avalanche 5.3L was also shipped with the Denso Iridium.

I agree with the design of the Denso plug, that looked like a very nice and very efficient plug. I have to special order them where I work and because of that I dont get my discount so I went with the NGK Iridium on my wife's car.

Massey