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t.o.zwei · 03-22-2017, 04:07 PM

This is awesome! I have always been confused why the computers always suggest R45ts and I have R44t or autolite26 in my 350's. Does it matter what head I have on the block? one set is supposedly of a 69 corvette and another set out of a 77 K20.

03-22-2017, 04:07 PM	#14
t.o.zwei Registered User Join Date: Apr 2016 Location: Salt Lake City UT Posts: 1	Re: ACDelco R45T vs. R45TS spark plugs This is awesome! I have always been confused why the computers always suggest R45ts and I have R44t or autolite26 in my 350's. Does it matter what head I have on the block? one set is supposedly of a 69 corvette and another set out of a 77 K20.