i want the connection to be tight... but i don't want to buy a t-bolt that's too small or too large...
for my charge piping being 2.5"... please consider the thickness of the silicon hose coupler too...

so do i get the 2-1/4 - 2-9/16" or the 2-1/2 - 2-13/16" t-bolts? (inner diameter of my silicon couplers = 2.5")

 

I ordered some 2 inch couplers from ATP turbo, and the 2.25 inch t bolts i got were too small. I had to send them back. But the 2.5 inch t bolts fit the 2.25 coulpler fine.

 

2-1/2 - 2-13/16" t-bolts, if you measure the outer diameter of your coupler should be bigger than 2.5" something like 2.60"-2.70"

 

if you coupler is 2" then get 2.25inch if you coupler is 2.5" get 2.75 if you coupler is 3" get 3.25 simple as that

 

The silicone coupling is 0.125" thick on my ride. I'm running 2.5" charge pipe...that makes for a total OD of the coupling 2.75"....go with the ones that open to 2.8125" and you'll be happy.

 

thanks guys