My cascade clamps always came loose and slid around. Now I just buy the green high heat hose they use on the inside and 2 hose clamps. Now they never slide with a perfect seal.
I run 1.25" ID silicone hose with 2 hose clamps, works great!
Yes, I believe that is what the green stuff I am using is. Where are you getting yours?
It's been a few years since I bought some, it was from some turbo shop online, I think here:http://www.atpturbo.com/mm5/merchant.mvc?Screen=PROD&Store_Code=tp&Product_Code=ATP-SIL-027&Category_Code=SILBThis site has a bunch of silicone hose:http://www.siliconehose.com/silicone-heater-hose-1-25-id-1-64-od-0-200-wall/http://www.siliconehose.com/1-250-id-4-ply-silicone-saej20-compliant/