The reason I'm running bull horns is I do have my now street exhaust and it v-bands to my 5" collector. There is a transition from circle to the equivalent 5" oval for clearance under the car. That transition created so much back pressure that my car blew the O2's out of the exhaust with the bungs attached to them. With those 5" horn, I'm sure I have eliminated that problem.
Yep your right...
