Starboy

I agree with Mille Racer, Acer. Glasspacks are really constrictive above 3,000rpm. Magnaflow are my preference, engineered for extraction, but Flowmasters are good too. I know, a nice V8 exhaust rumble is great, I love it too. I guess we all do. The crossover pipe w/good quality mufflers works. I little more money, but you can get the sound you want and enhance performance. What about saving a few more bucks, get some good headers and full flow cats to go with the duals?

country_09

flowmasters are real restrictive to though, probably worse since they're chambered while the glasspacks are straight through. I'd do LT's with no cats and a x-pipe to balance it with two dynomax bullets.

slw210

Here is one chart I found. Every forum you go on has a different best flow muffler. Get what you want. I look at flow charts and then check sound clips.

I think you want to figure on 2.2 CFM per Horsepower. So 300 HP would need to flow around 660CFM

EXHAUST FLOW

Starboy

Acer, I hope you have not put glasspacks on your truck yet. Mille Racer makes some good points. I really don't think they're a good solution, at all. Ask some experienced mechanics, ask here, but glasspacks are restrictive, especially bad after around 3,000rpm. I like the Magnaflow product, flowmasters are great but I like a quiet rumble and the Magnaflow stainless steel is really a long lasting solution. My $.02.

acer9876

im not looking for much of a power boost, more of just a sound upgrade, and i never drive over 2200 rpm's

acer9876

yes, i would like more flow, but im not building a race truck. Im just making small mods to a stock truck to make it a little better

acer9876

performance cats..... where could i find some that are worth something for cheap? and still read correctly with my sensors?

monkey

I would install Hooker aero chamber mufflers,as Im going todo when Im due for exhaust.
Merry xmass

country_09

Magnaflow high flow cats are bout as good as they get