I gapped the new plugs @ .040". You never forget your first Champion ®. Enter vehicle info. Since Iridium spark plugs are the best spark plugs on the market, it should be no surprise that they’d also be the most expensive. Not only in terms of what brand’s best, but also regarding the best type to put in your car. spark plug show down NGK vs. Champion. It used to be that one could use AC/Delco plugs in GM's, Motorcraft/Autolite in anything Ford & Mercury/Lincoln, Mopar had their plugs made for them by Champion (I think). These three are the usual suspects if your OE parts went kaput. See cross reference chart for Champion L76V and more than 80.000 other spark plugs. Jump to Latest ... the 4.0/4.2 amc motors from the late 60's and early 70's in the carbourator days. Plugs looked practically new but swapped them out with Autolite Iridiums anyway. The carbs could have used a rebuild too, I am sure. Apparently Autolite plugs are too "cold" for the R18 engine. The 6 cylinder model, takes a NGK BUHW, or a Champion L76V. 23 replacement spark plugs for Champion L76V. Spark plugs…name an aftermarket part that has led to as much discussion as these fellas. Why use NGK plugs I changed my OEM NGK plugs at 100K. Our spark plugs have been improving engine performance since 1907. Both are less than half the price of Denso or NGK … GENUINE Champion Copper Plus Spark Plug RCJ7Y. The reason i am asking is our local motor factors have said they used to sell Champion spark plugs but they had so many returned that they completely removed the Champions and now stock/favour the NGK's. The NGK plugs are made from a fine wire center electrode that comes with a Copper Core and an Iridium Alloy tip.The nickel electrodes have an Extremely High Melting Point and come with a Trivalent Metal Plating sealed in a Pure Alumina Silicate Ceramic Insulator with Corrugated Ribs.. If you’re someone who is on a tight budget, then you’ll probably want to look for cheaper spark plugs. Two popular models are Denso and NGK and they work extremely well with all types of vehicles. My old 1971 100 HP Evinrude could foul NGK plugs just as well as Champion plugs. NGK spark plugs push the limits of performance and innovation, bringing the most advanced technology to today’s high-efficiency engines. Pulled out Autolites and replaced with NGK laser iridiums. Our Top Pick: NGK 6619 Iridium Spark Plugs. This seems like a good wealth of info on this forum.I'll be changing out the spark plugs on my car soon (almost 100K miles) but I'm not 100% on which to go for. Brand New Champion Spark Plug N7YC. My personal rule of thumb has been American outboard, American spark plugs. Let’s talk about Bosch vs NGK vs Denso spark plugs. Part Number. Spark plugs, glow plugs, lambda sensors and ignition leads from Denso, Champion, Beru, Magnecor and NGK. £1.99 + £16.63 postage. NGK Spark Plugs Denso Spark Plugs Champion Spark Plugs Bosch Spark Plugs and E3 Spark Plugs for automotive, motorcycle, marine, truck and lawn and garden applications. You never forget your first Champion ®. *Ratings are from Amazon at the time of publication and can change. Product Type. From the high-tech Ruthenium HX™ to the industry standard OE-style spark plugs, NGK drives the future of spark plug engineering. There are a couple of spark plug models in the market. The 3 cylinder model Mercury 90, uses a NGK BUHW-2, or Champion L78V. product cross reference.