My '06 Nissan Sentra 1.8L Special Edition (QG18 engine) with ebay short ram intake, ebay 4-2-1 header, Magnaflow cat, and Flowmaster 40 series muffler, with resonated tip. Stock 1.75" piping aside from the addons which are 2" or 2.25". Sounds so-so in this video, but in person it sounds deeper. Next I installed a 12" Dynomax Bullet muffler/resonator after the catalytic converter and went with 2.25" piping all the way to muffler. That got rid of most of the raspy high pitched sound and loud drone inside, except under high load and 60+ mph. The price to pay with this muffler I assume. It's an auto transmission, and still as slow as the day I got it.
nissan, sentra, 1.8, qg18, flowmaster, 40, series, intake, exhaust, muffler