i tried to install a skunk 2 manifold on an ls thats swapped into a 94 ex. only problem i had is that there sometype of bypass thing under the throttle body it kind of looks like coolant goes thru a big hose into a smaller hose then back into the manifold i thought about bypassing this but i would rather ask you all first if anyone with an obd1 ls motor had this issue and what did you do to fix it