Intake?
Current Mods:
GIAC Engine and Tp chips
K&N
Its a very good idea to port the intake manifold, to atleast "match" the larger ports of the heads.
Also every component upstream, & downstream can & should be modified, to handle the larger amounts of air, the heads could handle after their porting. ;O)
If all you do is port the heads, and nothing else, your gains will be small.




