I would go out and do a measurement myself, but my car is garaged for the winter and I've been kinda busy with work lately.

Heres the dilema, I want to swap out the bypass valve for a coupler valve since I will not be driving the car through any extreme rains. My question is what size coupler hose do I need to go buy? thanks.

 

Okay, well does anyone know about how hard it is to swap out the bypass for a coupler? can it be done within like 10 minutes to accomodiate for rainy days?

 

i believe it is 3 inch. yes, i'd imagine you could do the swap in a coule minutes with a screwdriver.

 

uhm,, just use one of the existing couplers that was holding on the bypass??? what did i miss LOL. and dude, never put that bypass back on again, please, it blows dogs and you lose HP.
dave