I need a 4" down pipe with a 4" v-band clamp. Any one know wher i can get one?

 

Buy some SS or Mild Steel, Mandrel bends, etc... and make one.

If you go 4" you're going to need to go custom. Take it to any performance shop and they can fab one up for you. I had my whole exhaust done in striaght 4"

I got a 3.5" vband off the turbo, then a transistion pipe from 3.5" to 4". Then the 4" runs down as a downpipe and midpipe together, which then has another vband to connect the 4" exhaust with magnaflow muffler.

 

ATP turbo got me my 3 inch vband, 3 to 4 inch flare, and all my straights, 90's, and 45's in 4 inch pipe.

Jegs got me both 4 inch magnaflow exhausts. Oval for the midpipe and round for the tail.

 

I just went to Detroit Diesel and bought some 45 and 90 bends and a straight piece. They also had 4" Vband connections so I got that too.. so .. just to weld it all together and Badda-Bing !