Making my own true dual setup and all I need are four 45* bends. Where could I come across these? Napa doesn't have them because I'm looking for 3" tubing.

 

You can get them from Jeggs or summit from hooker. You may be able to get these from hooker online, go to www.Holley.com and then go to the hooker section. If this fails an exhaust shop should be able to make them for you.,

 

Yep, just get 'em from Jegs or summit. I believe I bought dynomax aluminized U-bends from summit.

 

You can also check with your local muffler shops or shops that deal with tractor-trailer parts.