The difference between an 840 and a 291 head is?

02-15-2006, 03:52 PM

WILMASBOYL78 WILMASBOYL78 is offline

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Re: The difference between an 840 and a 291 head is?

Minor chamber difference..106.8 on the 840 and 109 on the 291. Exhaust valve size was increased to 1.88. Most 291 heads will also use the small 5/8 taperd seat spark plugs.

wilma

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