How do these plups look? Worth changing?

**StuntmanMike** · 05-28-2008, 08:03 AM

I was planning on doing the plugs on my Formula today. It's an '00 with 77k miles. I had assumed they'd be the originals, but when I pulled one of them out, it was a Denso. Stock would be a Delco, correct?

Here's a few pics of the Denso (left) next to a brand new Delco Iridium:

Should I change them out, or just leave them in?

Thanks!

**89LX** · 05-28-2008, 08:06 AM

If you went to the trouble to remove and not sure of their history change regardless how they look. IMO.

**twozs** · 05-28-2008, 08:33 AM

i just did the plugs on my 01 z recently and thought that they would be a delco and lo and behold they were denso also i was surprised . I'm the original owner and brought the car with 3 miles on it so i guess the came from the factory with denso

**2001NBMZ28** · 05-28-2008, 08:41 AM

I'd change them. My car came with denso PTJ16R15's.

**StuntmanMike** · 05-28-2008, 08:49 AM

Wow, that's funny. I figured Delco would be stock.

Yeah, I figure I might as well change them. I have all the tools out and everything, and it'll give me something to do today.