bully 10 Posted December 5, 2013 im gettin a loud rattle at high revs, and ive been told my manifold may be cracked... my questis will i be able to replace the cast iron manifold with a 4 branch conversion? or does anyone have the cast iron manifold i can swap for some pennies :) Please let me know what u got and how many pennies it will cost :) Quote Share this post Link to post Share on other sites