Only serious engine builders need apply! Dual 48 IDF's are a little rough for street use but come out of the gate like a rocket. If your looking for mid-range and upper end power, Dual 48 IDF's should be on your shopping list. They work best on engines with stroker cranks and big valves. The installation and tuning of a set of Dual 48's is simplified by the use of our superb Crossbar Linkage.




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