Bonneville America Forums Forums Technical Forums Exhaust Help with Drilling

Just removed my first baffel in my stock pipes and I found a surprise. There is a wire mesh screen running on the inside of the pipes between the first and second baffel against the inside wall making it very hard to get to the second baffel welds. In fact, the second baffel looks just like the first, no spot welds as I was expecting! Anybody else run into this problem?

Not a problem. Just knock it out. The next baffle looks the same as well.

I have been pounding on the second baffel for awhile now, and it won't budge. Do I need to get that wire mesh off the walls to get to the welds?

You have to hit it pretty hard around the outside edge of the plate. It'll come out.

No ,I left all the mesh in place. I did it with an air hammer on about 10 sets of pipes. Nology (I apologise if I spelled that wrong)tried it my way and had no luck though. I did 1 set of pipes with a piece of 5/8 round stock from the header end but I don't reccomend that. It worked just fine but was very difficult.I didn't even hurt the reducer when I did it though.

hit it harder ;-)

I kept working it, but I think I have crossed the point of no return. The mesh has collapsed down and plugged the pipe. I think my only option at this point is to completely clean them out strait through. How should I go about this, or is there something I am missing. Dog, I know you helped nologic out with a similiar issue. I know I will lose back pressure with everything out of the pipes, but I just don't see another option. What do I need to do next to salvage my pipes?

It is possible to go in from the header end with a piece of round stock and knock everything out and still save the reducer. I did 1 set that way. Very difficult and a huge PITA but it can be done and still no exterior damage. Be sure to rest the end of the pipe on a block of soft wood so you don't damage the exterior.

I used a 3/4 inch pipe black like they use to run gas lines in your house. 3 and a 1/2 foot piece should do it. Inserted pipe near the edge and brought both down on cement. work around should take 4 or 5 hits. After loose. Then used a coat hanger with a hook, slip it in the small tube hole put the other end in a vice and gave it a good yank. Out it came. Works for all except the first one. The first one I drilled all around the edge then used a drimmel to smooth it down.