My friend got his 03 cobra 2 months ago(previous L owner). So it is time for the mod on the cobra. i have a 2lb of my L that i will give him but I have a question about it.
If a
2.93 is a L upper
3.11 is a cobra upper
7.5 is L lower
??? is cobra lower
How do they both make the same 8psi of boost
If what im thinking is correct then the cobra has a bigger lower pulley from the factory.What do you guys think about the L 2lber on the cobra?

 

ttt