does anybody know who makes off road y-pipes for shorty headers?

 

Jegs.

But you would be better off to ditch the shorty's and get some longtubes.

 

or just cutting/welding ....

 

i would cut them off but i wanna keep the stock pipe just in case i need it i live in houston and need to pass emissions.

 

Shorty's aren't going to help performance much if any. They are basically fancy looking manifolds. Long tubes with a tune will get you 30+-RWHP.

If you don't find one you can easily have one made by any reputable muffler shop.