Chevy Impala SS Forum banner
1 - 1 of 1 Posts

·
Registered
Joined
·
5,693 Posts
60 lbs lighter than iron. Your bottom end has nothing to do with the heads. Iron heads flow better in stock configuration. Alu. is an upgrade ONLY when you have proper head work done, which the alu. heads are better because they are easier to port & polish.
 
1 - 1 of 1 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top