Alright as you all know.. i have a stright up Vibrant Cat back systems..
i want to know

Is GMPP Exhaust better then Vibrant Exhaust In :
Sound
Performance
Air Flow...

And

Is the GMPP Air Intake better then Injen?

 

GMPP is smaller, it will prolly flow a little bit less. Vibrant is louder. I dont know if you will tell a difference in performance. I have the GM catback on my SS/SC and it is slightly modded, I think the catback does its job great.

It is going to be damn hard to tell the difference from one aftermarket intake to the next.

 

yeh, i kinda like the way the gmpp intake is.. but im wondering if it is better/or/worse

 

The Vibrant is better I'd say, as for the intake, it's not gonna matter much.. you might see like a 1 or 2hp gain.. I wouldn't spend the money for it.