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Old 01-13-2018, 11:33 AM   #1
applebmw
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spark plugs info

Swapping cast iron heads for aluminum, noticed the spark plug holes have over twice the threads. What plugs do I get?
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Old 01-13-2018, 02:31 PM   #2
B. W.
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Re: spark plugs info

What heads are you using? The info with your heads should spec. what reach plugs to use. (if they came with any!)
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Old 01-13-2018, 04:53 PM   #3
applebmw
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Re: spark plugs info

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Originally Posted by B. W. View Post
What heads are you using? The info with your heads should spec. what reach plugs to use. (if they came with any!)
Procomp heads, I will check the specs, don't remember seeing that info, So there are different reach plugs? My guess would be the plug just clearing the heads...
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Old 01-13-2018, 09:15 PM   #4
B. W.
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Re: spark plugs info

14mm x .750 reach (19 mm), 5/8 hex, gasket seat

Last edited by B. W.; 01-13-2018 at 09:21 PM.
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