Slug

Hey Im still pretty new to all this and I was wondering how you could tell if you have too much back pressure?

Can you just "feel" it or is there some way to measure this (cheaply)?

the reason i ask is because i just installed HS header along wiht CAI and a new cat to my existing Greddy exhaust and I feel no increase - just sound which is actually too loud for me.

I have heard talk of back pressure that maybe i dont have enough, or that i have too much. Could it be the cat? the resonator?

Thanks to any who can help!!