boost brake line 1.8t agu

[A3-20VT]

can i change this hose with aftermarket sillicone hose with same diameter? only the section that come from the manifold to the check valve

 

[<tuffty/>]

Sort of... problem is that the larger ID silicon vacuum pipe isn't very stiff and as this pipe sees vacuum then it can collapse which of course would be bad...

You can get smaller ID in proper laminated silicon hose though and is what I have used on big turbo builds in the past

<tuffty/>

 

[A3-20VT]

Well i installed a sillicone hose that is ID8mm OD14mm worked perfect