Two sets of 2" pipe will be sufficient. @.5" would be way too big, and in any case you would never fit 2 2.5" pipes around the tank....
2000 SVT Turbo 295hp/269ftlb@12psi
#1 for Bendix Brakes Kits!
Knuckles rebuilt w/new bearings $55
AUSSIE ENDLINKS $70
Gutted pre-cats $80/set
A lack of planning on your part does not constitute an emergency on mine!