pipe size for big hp 360

[cudachall74]

ok so all my bigblock stuff is sold now and ive got my new 360 im wondering if the current exhaust system will be big enough.the new motor is a 60 'over ,360, eddy heads flowed at 555hp,port matched airgap intake, solid roller cam 590 lift,825 dp demon carb.[thats the basics]the system on the current 360 is tti 4 into 1s,primarys start at 1'5/8 step up to1'7/8 then down to 3' collectors then into a twin 2'1/2 system with h pipe through dynomax mufflers.the new engine should make 500hp,can any of you guys running big hp small blocks elaborate on your setups

[Chryco Psycho]

I would use a dual 2.5 " with an X pipe

[punisher72]

Why don't you just run with twin tooheys new longnecks?

[moper]

The biggest issue with E body stuff is the tips. I think 2.5 will be ok, but the tips have to maintain that 2.5". Factory tips are only 1 7/8. So just make sure that is kept open.