What size is the Silicone Ducting for Intake?

[ej8_st]

I want to buy a mishimoto silicone ducting and they offer 4 sizes, which size is for the intake part of the ducting? Is mishimoto one of the best or is there better?

http://m.mishimoto.com/controller

 

[I_GOT_BOOST]

Idk about it being the best but most after market tubes are either 2 1/2 for d series or 3 inch for b get a 3 inch to be on the safe side


Using the tapa ya tap tap..... Tap

 

[2slo4u]

its just to route air into the actual filter so i don't see why any size wouldn't work.

 

[mc360]

the throttle body is 2.5 inch so the inner diameter of the silicone should probably be 2.5 inches

 

[cvcrcr99]

OP are you using this to duct air to the filter, or is thing going to replace the intake arm?