if they use it on the dyno then...
 

im doing the AFR 185,vic jr intake,650 demon,comp cams setup..it made 455 on the dyno using 1 3/4" primariys to 3" to a 14" long collector(MM&FF)...i should just get full 3" right???i was planning on full mac setup with dumps..the motor is going to my DSS 306 for now only sprinning upwards of 6500 but i can def see a 331 or 317 (swap to 750cfm and rev it higher)in the year comming up so this will prepare me better???this motor will also have a close to a 200 hit on it:D ..what do you tink..i just sold my entire 2 1/2" setup and dont want to buy it again:mad: ..i figure if they can make tha much tourque as they did with open 3" exhaust then a full 3" setup should be fine...just tell me yes please:D

I say..
 

yes..:D

If you plan to make power in the future that will need the larger exhaust go ahead and get it now, the 3" system is tight back over the axles, but I assume you may get the Pro Dumps.

The only 3" X-pipe I could find was a Dr. Gas.

Good luck on that 200 shot, you may be rebuilding before you know it...:eek: