I just got done crawling under the gas hog (89 F350, 7.5L Gas) And discovered when ever they put dual exhaust on they took out the CAT, the air tubimg running from the smog pump and the tubing from the cat have been just tac welded i gues to keep it from flapping around.

My Question: If i have holes or nipples installed so I can hook up these tubes would it run a little better? if so do hook them both to the same exaust pipe or opposite side, or does it even matter?

 

Does anybody have any idea? im getting more responses about tire than this

 

The tubes from the air pumps were used to add extra air to help the cat converters. It shouldn't effect performance since the cats are now gone.
regards
rikard

 

wont matter, i had them dissconnected on my crown vic when i ran a mustang h pipe.