high flow fuel rails vs stock

I have been debating on upgrading my stock fuel rails before I get my car tuned. I am running a vortech setup with 42# injectors. I have a small kink in my fuel supply line at the intake manifold and I want to replace the rail before its too late.

How much hp with the stock rail hold? What are the pros of an aftermarket rail (vortech/aeromotive)? Where would I mount the fuel pressure regulator? THANKS
 
Supposidly the stock fuel rails flow to 400-450hp. The sn95 ones are said to flow more than the fox ones. If you have a kink with forced induction I would upgrade to an aftermarket setup. You will probably be bottlenecking your setup and running lean. Far from ideal.
Kevin