Professional Answer to Exhaust Size Question 2.5" vs 3"

3" has a habit of being alitle harder to tame down when it comes to decibels,but alot of the times you also get a bigger and deeper sound and with bigger i dont mean louder just a "bigger" rumble. at 500+ REAL hp 3" is what you want for power.
getting the pipes to fit over the axle and betwen the springs isnt that hard if you are good at cuting and welding universal mandrelbent tubing!