1993 Chevy Astro. Fits perfectly. 3" input and 2.5" output. About 22 inches long. This came with a heat shield welded on top. Nice gesture. I had a 1994 Safari that had a great exhaust note and a nice rumble at idle. In comparison, this Walker 18223 isn't loud at all, but it does have a faint hum/glug when idling. Not as aggressive as my old Safari. Better than stock, smooth tone, no hum at idle or 55 mph. A good choice for a budget muffler for a nice smooth tone. If you want that aggressive loud hum then check out the Flowmaster.