Speed Secrets seems to be the closest shop to me (Mount Vernon). Has anyone had work done by these guys? I wanna get my 243's built and ported.

Since I'm on the topic, I'd like another opinion. I have my set of stock LS2 heads and a set of LS6 243's with the sodium valves. One set is going on my '05 GTO. Does either one hold an advantage to porting and and modding over the other?

 

Castings are the same. The light valves are a plus for sure if you plan to rev it.

Ron

 

Ellis Groo at Speed Secrets is a great guy and does great work. You won't be disappointed.