Best plugs? Bosch denso ac delco ????

[nelson84]

Which plugs gives the best performance?

 

[lcjstoy]

I have been using AC Rapid fire plugs, no problems yet.
Len

 

[Toms007]

I went with NGK plugs TR55 (94 LT1).

 

[Hib Halverson]

I use Denso Iridium Power plugs in all my engines, not only in the Vettes, but all the cars.

 

[Robertwav1]

What I have found over the years is that it's more important to change the plugs no matter what brand you prefer. 25 - 30K miles can actually wear the plugs by as much as .004 to .008. Even though the wear is less extensive with electronics it still exists. And that 100K miles tuneup is BS to me. My opinion.

 

[onedef92]

I like the NGK TR-55 Double Platinums in my LT1.

 

[Key West Jack]

What I have found over the years is that it's more important to change the plugs no matter what brand you prefer. 25 - 30K miles can actually wear the plugs by as much as .004 to .008. Even though the wear is less extensive with electronics it still exists. And that 100K miles tuneup is BS to me. My opinion.

I agree changing the plugs, to me all the usual suspects make a good plug.