I have a split stock manifold, 2.25" ID pipe and pair of 30" Smithy's under the cab. Boy was it loud. lol. Slipped in a pair of Khrome Werks 2.25" OD HP Plus drag pipe baffles right after the glass packs and it now sounds perfect. If I decide to go quieter, I'll slip in a second pair of the same baffles turned 90° immediately after the first set.
Here's the entry on my blog with the details and pics -
http://rustyfiftyone.com/trading-one-leak-for-another-is-exhausting/
