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The higher number is hotter, so the R45TS is hotter than the R44T. If your heads have tapered seats, then you would need the TS, which is available in the same heat ranges as the T.
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Recommended spark plug for 1980 Chevy 350?
THE FACTORY REPLACEMENT PLUG -R44T OR TS .. BUT MOST EVERYBODY RUNS NEXT HOTTER PLUG -R45TS!!!!
What is the best spark plug for a small block Chevy?
72-75 AC R44T 76-80 AC R45TS
What spark plug should be used for a 74 Chevy 350 with MSD. It needs to be a short because of the headers. Do not want Accel.?
Accel makes shorty plugs that will work. Cross over a AC R44T to the Accel or if you drive a lot in town, cross a AC R45TS.
What is plug gap 71 Chevy 350 engine?
Spark Plug (ACDelco R45TS) [Gap @ .035” for points distributor, .045” for HEI distributor]
What acdelco spark plug should I use in an 1992 RS Camaro with a 305 5.0liter R45TS or CR45TS?
You should use the R45TS spark plug on a 1992 RS Camaro.
What spark plug for 1972 Chevy 350?
A/C spark plug is---R44T and the gap is 0.035
What spark plug would a 1977 Chevy 350 take?
A/C plug # R45TS and it gaps at 0.045 That is the factory plug.
1980 350 Chevy motor what are the right spark plugs?
The a/c plug # is R44T or R44TS plug gap is .045
What is spark gap for a 1976 Chevy 350 engine?
Factory plug TYPE is R45Ts plug. Gap is 0.045
I have a 1975 corvette with a J motor when I got the car I noticed they had R45TS spark plugs. It runs ok but my question is should I put the correct number R44TX plugs or not. Thank you Rob D.?
the 45 plug is just one step hotter than the 44 plug.
What is the spark plug gap for a 1977 Corvette?
Spark plug gap for a 1977 Corvette using ACDelco R45TS is .035
What spark plug should you use in a 350 small block 1979 el comino?
R45TS
