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Cast iron intakes were less expensive...

February 10 2018 at 11:19 PM
Jeff H.  (Login wsu0702)
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Response to 29 lb vs 81 lb

So for mass production (i.e. 428CJ) it was the better choice. 428PI's were very low volume. BTW the cast iron 428CJ intake out-performed the aluminum 428PI in Jay Brown's intake comparison testing.

 
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