Where can i buy NGK plugs for my car? ive looked at some sights and will any tr55 work for my car or is there a specific part # im looking for? cause i cant tell on some of these sights..

Where do you live? I bought my TR55'* at 3 different local auto parts stores, and I order my TR6'* now from Napa. Local store, but the website should work, too. www.napaonline.com I think, or PM Kennginn.

We have napa stores around here, and should i go with the iridiums? worth the extra cost or just stick with regular? and also should i get new wires and O2 sensor while im at it?

If it'* in the budget, do wires. Get the Taylor Spiro Pro'* from www.grandprixstore.com , and an AC Delco O2 sensor from the dealer or www.gmpartsdirect.com (part numbers in Techinfo).

SC cars seem to prefer copper plugs, but I've never run irridiums. I'd stick with the Copper V-Power plug design, personally, but it'* your call

Ok if i buy the wires from grandprixstore.com im gonna buy the plugs there too, will the tr55'* they have on their site work in the bonneville or is it specific for grand prix'*?

Same-same. Identical drivetrains.

i have over 40,000 miles on my car with tr55ix irridiums
i pull a plug to take a look at them every oil change.
so far so good, i like them !

i found my NGK platinum tr55GPs at sparkplugs.com, ended up bein about $25 with shipping for the 6, they have many other kinds as well though

You can get the V-Power NGKs for under $2.00 at Napa. Murray'* gets about $4.50 each for them! Napa typically doesn't stock them, but they can get them same day from their warehouse.

My local Autozone carries the TR6'* in stock.