Looked into this myself. Not a dual system, but a single.
Ended up going to a local reputable exhaust company as chunky_wrangler suggested.
He suggested that the original exhaust was fine and cant be improved much, however the muffler is quite large and restrictive, so I had the muffler only done. It does have a larger inlet & outlet as well.
Built mine myself for $70.
Different reason though. To get more clearance so I don't keep squashing the pipes etc every time I go out.
Only a single tail pipe which is almost hidden.
And that's still the second tail pipe fitted due to being squashed.
I got a black magnaflow dual outlet muffler to suit JK on ebay sent from usa.
Was a lil pricey but fitted perfect, looks and sounds great.
No drone, quiet at cruise and awesome note.
I also replaced the rear muffler with a lukey resonator. Sounds good and no drone but it has changed how the auto shifts. It now changes gear alot earlier in the Rev range. Unsure if it's related or not but only started happening after I replaced the muffler.
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Dual exhaust / where to buy?
