I know this is a very general question but I can't figure it out. I have a set of pacesetter LT for my 2k silverado. I bought a OFY also but I can't figure out the size/thread of nut to use for the studs to connect OFY to the muffler. Please help its the only thing that is stopping me from getting to play with my truck. The roads are dry and I got nitrous to burn!

Thanks

 

I dont no the size, but i used one of the nuts off the old manifold that held the y pipe on....hope this helps..