... where did you get your silicone hose connector? Most places sell it up to 3" or so, but I haven't seen it anywhere in 4" I.D.
Thanks,

 

Try diesel shops... at my job (turbo developer) we have purosil (silicone) couplings up to 6" diameter for large engine semis.

 

dbman96,
Thanks! I'll do it.

 

If you want you can buy 4" to 3" reducer coupling at home depot. I got one for my turbo but i ended up not using it. (I have a 60-1 t3). I just got a K&N filter with a 4" size inlet and put it straight on the turbo, no piping at all. In my situation there is absolutely no room in the engine bay to route more piping for the filter.

 

Home Depot couplings will start to melt on the first signs of boost. Don't ask me how I know...