Tune-Up Time

[djKale]

I'm right at 95K and looking to replace the spark plugs, air filter and serpentine belt on my 99 STS. Can anyone recommend a specific plug for better performance? What's a good brand or serpentine belt to buy? I already did the fuel filter. Anything else I should look for?

Kale

 

[ALBUNDY]

I believe the GM plugs are just as good as any of these marketing three pron four pron believe the hype plugs. They are high performance plug for a high perfomance engine and should do just as well if not better than any of these after market plugs.

 

[Jamler3]

I'm right at 95K and looking to replace the spark plugs, air filter and serpentine belt on my 99 STS. Can anyone recommend a specific plug for better performance? What's a good brand or serpentine belt to buy? I already did the fuel filter. Anything else I should look for? Kale

I would go for a set of Autolite XP Xtreme Performance...
If not into that platinum, then Autolite 764's or the new Copper Core...
I don't think they last as long as the XPs, but they are cheap.

 

[KD00LS]

Bosch +4 Platinums are "the best" spark plugs you can get I believe, they run about $7.50 a plug I think. Take other people's advice over mine.