regency

iTrader: (15)

Im not sure on what would perform better:
Pacesetter LT's with cutouts on header into 2.5" Dual in / Dual out magnaflow with built in X pipe with either turndowns or out the side like it is now
Pacesetter LT's with ORY with one cutout into 3" single in / 3" dual out magnaflow with either turndowns or out the side
i dont know if it would be better with one cut out or two either. all the truck guys run duals and all the car guys run ORY

WJ MARK

iTrader: (7)

Ive always heard that a single 3" will flow more than dual 2 1/2's. But I like the look of dual comming out the rear.

BLACK04VHO

iTrader: (2)

It really depends on what you have done. I like the sound of true duals better, but for my supercharger I need all the flow I can get. Dual 2.5 will outflow single 3 inch but to see anything you really need some mods.

53bowtie

iTrader: (6)

i took this from a thread written by literddevil......it is some good infor to help you out with singl 3" or dual 2 1/4".....i personally have a 3" in 3" out on my 02 5.3L......

2" is 3.14 square inches
2 1/4 is 3.98 " "
2 1/2 is 4.91 " "
3" is is 7.07 " "

You can see going from 2.5" to 3" increases the pipe size by over 40%.

a new level

iTrader: (8)

The car guys have no choice but to run one pipe (ground clearance) Run duel 3"... flow like a mother F'er. Look at it this way. If you're doing cut outs, you want the flow. Right? To hell with 2.5" this aint the 90's anymore.