which 55 seris head fits a 404D August 29, 2009 11:54PM
WITH LARGER INJECTORS

Re: which 55 seris head fits a 404D August 30, 2009 12:59AM
any of the 55 will bolt on, but un less you notch the sleeves to clear the valves it wont work, ot that was the problem i ran onto. the valves were too big to go down in the cylinder if it is still 404,

Re: which 55 seris head fits a 404D August 30, 2009 04:09AM
& if you notch the sleeves you loose all the beneits of the 55 series. If you're 4.25 bore stick with the 40 series head.

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