4 pages with no answers. C'mon lads!
1. The exhaust bloke you saw is full of shit.
2. Sounds like you don't want to spend a lot of dosh.
3. Go to a different exhaust place, tell them to remove that abomination of a muffler you currently have from the rear diff back.
4. They can use that for a template on your new 2.5" mild steel diff back, running into an offset, glass packed oval sports muffler.
5. Add a nice 4" tip.
6. While it's on the hoist, have them check for a centre resonator.
7. Fork over around $250
8. Get on the freeway and experience decreased drone.
YES!
THIS!
