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440 Stealth Heads. What Plug RU running? #942928 03/04/11 09:35 PM 03/04/11 09:35 PM
Joined: Dec 2004 Posts: 1,554 DC, MD Suburbs 440PURSUIT OP pro stock
440PURSUIT OP pro stock Joined: Dec 2004 Posts: 1,554 DC, MD Suburbs	What are you running for plugs? I'm at 10.55:1. 550 Solid Straightline and a SixPack. Thanks, Chris

Re: 440 Stealth Heads. What Plug RU running? [Re: 440PURSUIT] #942929 03/04/11 09:39 PM 03/04/11 09:39 PM
Joined: Nov 2004 Posts: 843 Suffolk,VA I ireland383 super stock
ireland383 super stock I Joined: Nov 2004 Posts: 843 Suffolk,VA	Was running Champion RC12YC, now Autolite 3924's. If you have a true 10.5:1 you might consider one step colder than these two.

Re: 440 Stealth Heads. What Plug RU running? [Re: ireland383] #942930 03/05/11 10:11 AM 03/05/11 10:11 AM
Joined: Jan 2003 Posts: 21,079 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,079 Niles , Ohio	I ran Autolites in my 12.5 440.Then went to NGK R5671A-8 stock no 4554.They seem to run better idles better etc.My sons price was like 14 bucks for the set.Im real happy with them after a year.Mine is street driven.Rocky Chrysler Firepower

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