fhernand

Hi to everyone again!

After 110,000 miles I think it’s time to change the spark plugs on my 99 Hard Top. So I removed the original plugs that came with the car and guess what I saw: NGK PTR5C-13

I was very surprise that my corvette didn’t have the ACDelco 41-985. The local auto-part store didn’t carry the NGK PTR5C-13. So I really don’t know what to do. Go with the NGK PTR5C-13 or ACDelco 41-985?

BYW, I’m the only owner of my 99 Hard Top. And after over 110,000 mile, I’m very happy the performance.


Thanks to all,

madmatt9471

You could check with them and see if they have the NGK Tr55's!

These are what most C5 owners are running now and are excellent!

Gap 'em at 50 or the factory specs

Thanks,Matt