The smaller diameter that fits to the pass forward engine has a leak. The "PVC Tube" enlarges and wraps around the back of the manifold to the Drivers side on my 99 Z-28. The part is the whole tube and is $125 at the dealer. The fix would be the 4" smaller diameter that attaches the the front pass side. Does anyone have and suggestions on how the fix. Looks lide a 3/8 hose.