Most of the time when you try to reuse the stock inlet hose it will rip at the end. The rubber is very thin and over time it absorbs the oil in the system and gets mushy. Anytime you can improve the flow at the turbo inlet you of course are helping the system. I doubt however with that turbo you "need" an inlet hose if your stock one is not leaking. It of course would not hurt one bit to put one on and it would also ensure the future integrity of the intake over time.
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Originally Posted by Man2nv
I just upgraded my Legacy gt limited to an AMR CRX 500 turbo, with a up pipe , down pipe and cool air intake. I am waiting on a throttle body hose so i can mount my new tmic. My question is, with the mods i added how important is it to install an upgraded inlet hose?