EXCEPTION: NGK Racing Plugs: (Any NGK plug that begins with the letter “R”). The number at the end of the part indicates the gap. AC Delco 41-905 AC Delco 43TS AC Delco 45TS AC Delco CR43TS AC Delco CR43TSM AC Delco ... Any use of this cross reference is done at the installers risk. . . Starting with part # RCJ7Y (heat range 7), a colder plug would be # RCJ6Y (heat range 6), a hotter plug would be # RCJ8Y (heat range 8). Denso Iridium Power plugs feature the heat range at the end of the part number. . For example, SK20PR-A11 has a heat range of 20. However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. Example: R5671A-10 has a heat range of 10. . . I have not sent my rebate in yet but don't see why a Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. Not intimately familiar with the Accell numbering scheme, but you should probably be able to figure out which one would be close in terms of heat range… Starting with part # BKR6E-11 (heat range 6), a colder plug would # BKR7E-11 (heat range 7), a hotter plug would be # BKR5E-11 (heat range 5). Starting with part # FR6DC+ (heat range 6), a colder plug would be # FR5DC+ (heat range 5), a hotter plug would be # FR7DC+ (heat range 7). AC Delco 45 NGK B4 AC Delco 46 NGK B4 AC Delco 12556183 NGK PTR5C-13 AC Delco 40TS NGK R5674-7 AC Delco 41-101 NGK ITR4A-15 AC Delco 41-2XLS NGK BPR7ES AC Delco 41-4XLS NGK BP6ES AC Delco … . For example, FR6DC+ has a heat range of 6. From the old to the new and even the nonautomotive, ACDelco has spark plugs to fit just about For example, RV15YC6 has a heat range of 15. Place your order online today and pick it up in store … However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. Spark plugs 2016 1 6l fiesta spark plugs bob is spark plugs heat advisory spark plug range choosing the right spark plugCant Find Ac Plug Heat Range Chart Hot Rod ForumSpark Plug Cross Reference Heat Range ChartSpark Plug Cross Reference Heat Range ChartAccel Copper Core Spark PlugsHeat Advisory Spark Plug Range And What You Need … For additional assistance contact our tech team at 888-800-9629. . Please use it for reference only. THIS CROSS REFERENCE For NGK Racing Plugs, the heat range is located AFTER the hyphen. . . To contact Bosch USA, click here. Champion plugs are hotter the higher the number, colder the lower the number. So 4 is a notch or two colder than stock. » New Competitive Cross Reference Search 2544 is the coldest plug in that plug family, and 2546 is the hotest. . . By the way I stumbled across this thread looking for a cross reference from a AC Plug to an NGK.....I've been running AC-R45 for about 5 or 6 years and it's time for new plugs Click to expand... Joe look at it like this, if you have a (stock) 250hp 350ci engine and rebuild it to be 325hp you should probably drop the heat range to the next colder plug from what you were using. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. Find a Parts Stockist Search for your local part stockist! Autolite Racing AC Delco Champion NGK NGK Stock Number AR12 40TS RV9YC R5674-7 5034 AR13 RV9YC R5674-6 4449 AR23 See cross reference chart for AC Delco R44XLS and more than 80.000 other spark plugs. . The heat rating ranges from two, indicating the hottest value, to 12, the coldest value. A colder plug would be # R5671A-11 (heat range 11), a hotter plug would be # R5671A-9 (heat range 9). . . These are displayed as a 2 or 3 digit number after the hyphen. . . For example, 3923 has a heat range of 3. . . A one-piece ceramic insulator. Most parts stores have a cross referance chart. Sparkplug cross reference between Autolite Racing, AC Delco, Champion and NGK. Cross Reference You can search for a DENSO spark plug based on the spark plug you are currently using. Visit our site for coupons The spark plug is what started it all for us, and with over 100 years of innovation behind each spark plug, you know they're going to be great. Get product details, choose a store, and get directions. Now, with over 100 years of innovation behind each spark plug, you know you’re covered. Some NGK Racing Plugs are also available in half heat ranges. NGK indicates the heat range in the middle of the plug number. If it exists, you can add the part to your cart. Be the first to know about sales and promotions. Examples have been provided below for some of the brands we supply. Get product details, choose a store, and get directions. Autolite indicates the heat range with the last digit of the part number. Heat Range: 3 Additional Details More Information Brand ACDelco Cross Reference MERCURY MARINE 33-862029 CRUSADER MARINE 7243030 R030008A NGK TR5 … Once you have decided on a number, test to see if it exists by typing it into the search box. NGK plugs are colder the higher the number, hotter the lower the number. . A low heat range or hot spark plug has a long, thin insulator nose that heats up easily but does not dissipate the heat to the metal shell readily FOR ANY MODIFIED APPLICATIONS, PLEASE CONTACT OUR … Once you have decided on a number, test to see if it exists by typing it into the search box. Find a Battery Stockist Search for your local battery stockist! 3923 or 3924 and AC FR3LS or Bosch 7557 may work if they are, Autolite 3923 3924... 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