Plenum Coolant Hose Question

[msuhanek]

Afternoon all - Not sure if I explained this question properly but has anyone seen this type of setup on the LT5? See pic. The prior owner (a ZR1 Registry Member) bypassed both the vacuum(?) openings as you look at the front of the plenum. He took about a 2 foot rubber hose and connected them together on both sides. He said this would help the cooling of the engine especially in hot weather. Any help is appreciated. Thanks