my smog pump is leaking bad where the tube hits the back of the head. This is making the worst exhaust leak (clicking noise) ever. but my questions are 1. how does the smog pump work, does it take exhaust gasses from the Xpipe and bring them to the back of the head or reverse? 2. has any one had this problem (might be b/c of new heads with motor swap)? 3. my friend/ mechanic wants to cut off the tube that leads to the back of the head and block it off, will that work? or should i go with the delete kit? 4. finally will this absolutly end the chances of me passing emisions? THANKS!