Head question
Jun 17, 2005 | 06:37 PM
#1
Head question
There are 2 (at least) castings of the vortec heads. Are 10239906 castings (which have a lower flow due to a remodified exhaust seat) as good on a pure street truck as the 12558062 castings.
The vortec heads are supposed to be a great bolt on for older (pre 96) engines, but would the 906s be worth bothering with?
The vortec heads are supposed to be a great bolt on for older (pre 96) engines, but would the 906s be worth bothering with?
Thread
Thread Starter
Forum
Replies
Last Post
5.3lSilverado
GM Engine & Exhaust Performance
25
Aug 29, 2016 12:48 AM
bbowerman
GM Engine & Exhaust Performance
10
Jul 26, 2015 10:57 PM
sauldgold
GM Engine & Exhaust Performance
3
Jul 23, 2015 02:15 PM