Quote:

My Dart weighs in the area of 3300 lbs race ready. I am running McCandless (Pro Parts) headers currently. Engine is stock stroke 440 zero decked with 915 heads (11.25 compression). Cam is DC 590. Thought the extensions might be worth exploring?



Most headers are way to short on the collector and
too long on the primaries... you could use about 16"
from the end of the primaries to the end of the collector