Spark Plugs

[BlazerLT]

Plats are all you need for complete and perfect combustion.

The iridium are extreme overkill on a NA 4.3L.

[Brian R.]

Iridium plugs only advantage is that they last forever (practically). This is great if you have a plug or two that require radical remove and replace to get to them.

[OverBoardProject]

I've had NGK on my Blazer for over a year now without any problems.

But then again mines still a carburated 2.8L. That might make a difference.

[ChiLLX]

How about Accell plugs? I was considering using those. Better get some input before I buy 'em..

[BlazerLT]

Stick to AC Delco platinum if your truck supports them.

[Rmbodie]

I installed NGK Iridiums in my LS1 a month ago . I have the bosch plats in my blazer for 2 years now , but like OBP , I have the old school engine . I have read too much about plugs rusting and breaking off in the head , so I try to stay with away from plugs that are black oxide , I prefer the zinc coated .
Anyway , I live 20 miles from a bosch factory and have friends that work there. So I try to support them . Rob

[ChiLLX]

Yea, I'll get AcDelco.. My blazer is a '99 with the 4.3. 4wd.. 105xxx miles on it, loaded.. I havnt done much to it performance wise, just the usual tune up stuff, fluids, lubricants, filters, etc. Got a K&N in it. my cat just started rattling, so I'm ordering a new cat.. Have a 20 inch glass pack on it.
It runs good. Its due for new plugs n wires, etc. So thats my next step. Changed brakes couple nights ago..

[BlazerLT]

make sure you use the platinums.