anyone know where I can get a cat. delete pipe that will fit my banks 4" system. I would like the pipe to slip on and off as the cat. did into the existing syste,. No welding.

 

im not sure of an existing pipe, but you could get a straight section of 4 inch pipe take some mesurments and have a shop bend it up for ya, have the ends flared so it slips over the old pipe and clamps into place

 

you could also have flanges welded on the cat section and your straight pipe section. that way when you need to change them out its just a matter of un-doing a few bolts. sometimes if you use clamps it deforms the pipe making it a PITA to get apart and back together. any local exhaust shop should be able to set you up.