This would be installed on a 396 solid roller setup.

 

how big and free flwoing is your single pipe?

i'd say with that big of a motor you'd probably pick up quite a bit...well worth the cost

 

I have Hooker long tubes, Mufflex 3" y-pipe, Borla Cat-back.

 

It does'nt cost a great deal of money to go dual~
2=dynomax race muffs,$130
1=X-pipe,$95.
4=45degree 3'pipes(from JC Whitney )$80.
3'collectors,misal-pipes,straps and maybe turndowns,$100.at most
AND WELD IT YOURSELF! I did

And a mufflex catback cost how much?,upwards of $550!