Just installed Warpspeed "B" pipe and re-installed a factory 2K2 muffler. It took my local muffler shop about 30 minutes to remove my old exhaust and install the Warpseed "B" and the factory muffler. Everything fit together perfectly and Warpspeed seems to make a high quality product, I just hope it doesn't rust too quickly since its not stainless steel. I removed a custom 2.25" crush bent exhaust and a Magnaflow dual tip muffler. I just couldn't stand the droning of the Magnaflow muffler inside the cabin but was worried about putting the factory muffler section back on. With the Warpspeed "B" and my factory muffler section I lost the noise but seemed to have equalled or bettered the performance of my old exhaust. Nice trade off if you ask me.