Ok boys and girls I have a set of flows 40's . Frankly they sucked. To much back pressure. now hold on before you all throw stones this set up I have is for a race car. now trust me this works. I cut open the muffler's and removed the V-plate inside welded back up with 14 gauge mild steel. no back pressure and not loud at idle or cruise but drop the hammer and such a nice roar. There is so much reduction in back pressure that I no longer need collector gaskets on my headers.
Ok boys and girls I have a set of flows 40's . Frankly they sucked. To much back pressure. now hold on before you all throw stones this set up I have is for a race car. now trust me this works. I cut open the muffler's and removed the V-plate inside welded back up with 14 gauge mild steel. no back pressure and not loud at idle or cruise but drop the hammer and such a nice roar. There is so much reduction in back pressure that I no longer need collector gaskets on my headers.
hjewell2 1 year ago