What sparkplugs do u guys recommend for a 98 mustang gt slightly modded?

 

If your not running nitrous or a supercharger then go with the factory ford plugs. They are platinum and last for 100,000 miles.

 

That would have been one for the search engine on here. But since you've already asked, a lot guys on here recommend the NGK TR55 w/ a .054 gap. P/N 3915 at most parts stores.

 

Factory Motorcraft Is just as good.

 

Same question for me. I have a 1998 Gt with the PI swap so 10.5:1 compression, do I need different spark plugs to ignite this combo?

 

Bosch Iridium Plugs never need Changing most likeley unless u plan to hit 300k in ur stang lol

 

bosch made my car run like sht

 

I used some cheap a$$ Autolite's from WalMart and my car ran like crap. Then I switched to Bosch and it ran even worse. Finally I switched to Motorcraft and it ran great. And yes, I gapped them all right.

cdman3d - I also did the PI swap and I'm running stock Motorcraft plugs. They're all you'll need.