Yep the fast flow vortec's surprised me as well about the small stems flowing less, i guess it's all about volocity/air speed. I would have never thought that
ops: I've alway thought bigger is better, but i guess the Vortecs is an almost perfect head for the street motor on pump gas. I guess it's kinda like the LS1/LS3 heads they flow like a big dog and produce big HP and torque in stock form. I guess GM is not so dumb after all :lol:
Zip.