Ls1 Heads
#2
On The Tree
iTrader: (1)
Join Date: Feb 2008
Location: Lincoln, Ne
Posts: 182
Likes: 0
Received 0 Likes
on
0 Posts
The only difference is in the casting process which leaves the 241's with smoother port walls. In stock form, the 241's will flow slightly better, but if you're going to port them there's no difference between the two.