back pressure
 

Guys my 2.5 flow master super 44 mufflers don't seem to give me enough back pressure, if I down size to a 2-2.25 will that raise the pressure any

Why are you looking for more backpressure?

Smaller exhaust will increase your back pressure.....I'm guessing your car feels slower with the new exhaust.....

Yes on slower and exhaust popping when I let off the gas

I was told 347s like a little back pressure

Yeah I've heard the same about the old push rods. Mine ran like crap until I put exhaust on it, guess it still runs like crap officially but I could tell a difference with the exhaust once the ringing subsided.

N/A motors like the back pressure.....Even with me being FI I could feel a power difference between the MBRP setups.....Car felt slower when I ran the straight pipes than with the mufflers.

So should switching to a muffler for 2.25 pipe do

You could also put in some high flow cats, it would be a bit easier than replacing all the pipe.

High flow cats would be the better route.