^^^ thisMy vote goes for the Dynomax Ultraflo Welded 17221, a bit shorter that the 17223.
Although I like the longer (bigger) Dynomax mufflers b/c the smaller ones can get loud when engine RPM gets up 3000+ RPM... personal preference.
I have one big Dynomax (one-in 3", two-out 2.5") on my L31 S10.
I have two smaller Dynomax (one each side, 2.5" in, 2.5" out) behind the headers on my 350 Camaro.
Don't have part numbers handy.
^^^ thisI've never been a fan of Flowmasters.
That Flowmaster "hollow" exhaust note is something I've never liked.