Any one use Bosch spark plugs?

[saadcobra]

How does it work with moded Cobra (chip +exhaust+ pulley)? Does it heat quickly (short time)? How its quality compare to NGK? What is the part # u used?

 

[saadcobra]

ttt

 

[05 Roush]

I had troubles with Bosch with the stock setup. I would imagine it will be worse with motor mods. The word "bucking" comes to mind.

Go with Motorcraft or NGK's.

 

[forged5.4dohc]

i had the +4 plat. plugs in my 99 and they worked fine.they werent worth the money though.imo