HMFDZ28
Full Access Member
I've gotten the inside scoop once and the Delcos are actually the better plug.
Where is this inside scoop from??? More LSx engine builders run and recommend NGK plugs then any other plug I have seen. And this is on up to 900-1000 horse motors.
I run NGK tr-55's, if you have heads/cam work then you wanna run at least the tr6's