I have a 1983 Pontiac Grand Prix LJ with a 231 V6 and it's been my daily commuter for quite some time since it gets relatively good gas milage. I decided to give it a whole new exhaust set-up and I'm very satisfied with the way it came out. From the cat-back, there is a single 2.5in pipe to a Flowmaster 40's Series (42), and from there, there's dual 2.25in pipes to chrome exhaust tips. It sounds great for a 3.8L in my opinion.
A link to the Youtube video: https://www.youtube.com/watch?v=T1B_gi9ejUg
[youtube]T1B_gi9ejUg[/youtube]
A link to the Youtube video: https://www.youtube.com/watch?v=T1B_gi9ejUg
[youtube]T1B_gi9ejUg[/youtube]