I think these are 28" ones...because that's what Advance Auto had in stock. $27 each, then a 30% discount online, so roughly $19 each...and a cheap way to stay neighborly (I also gave them advance warning).
For the car, I'm thinking of doing something odd. 2.5" off the headers, merged into a 4 or 4.5" oval pipe...back to a single muffler (4" Hooked maximum flow?)...then 3.5 or 4" out and over axle to a stock looking, custom made resonator. Anyone want to race a 318 with single exhaust? ;-)