2018年12月31日 · Factory plug is a AC44, but these are no longer available. AC44S are available, but I believe the "S" stands for an extended tip which is a little longer than the AC44. Other options are an AC43 or AC43S (I believe colder heat …

2024年6月27日 · I have 6 AC44 spark plugs new in the box I won't separate. $24.00 + shipping. PM me if interested

2005年5月18日 · Ok I know my 56 Buick century uses AC44 but what is the Autolite numberfor the same plug. My son bought me an 8 set of Autolite 85 and heclaims the dealer (Advanced Auto) said they were the same. However theydo not look the same. I also picked up a set of 5 new AC45 and 4 new AC44S at a yard sale...

2016年7月16日 · It's time for my '55 Special to get new spark plugs. It now has AC44 plugs and I'm thinking of using Auto Lite 175 plugs. The car has the Century equipment (4 bbl) and Pertronix ignition and runs very well. Would the Auto Lite be a better plug than the AC?

2024年12月11日 · The Buick shop manual shows the correct plug as AC44. They seem to only be available with tapered seat from what I can find. Been running AC43 but would like to know what others are using that may be a better option. Any suggestions are appreciated. John

2004年7月21日 · In order of preference ( Mine): ACDelco 44S (hard to find 20-30 bucks a set) ACDelco R44S (able to be found 15-20 a set)

2006年7月5日 · From an old GM AC 1945 sparkplug chart and the Buick section only. 1945 issue Passenger cars --1924-1942. First 8 denotes the 18mm series, second number denotes the heat range

2021年11月10日 · A few years ago I threw out a bag of sooty AC44 plugs. I have been using 45's in my GM cars for years. Recently I have turned to NGK plugs. I set the AC plug on the parts counter and ask to match it up. I figure if they run well in a V12 Jaguar they will do well in anything, has worked for me. Don't overlook wiggling the valve stems. It is easy ...