Better?
One is longer w baffling, one is shorter w no baffling. Glad I got the 18' baffled one. good backpressure so I didn't have to rejet. Great deep tone, but quiet enough my neighbors don't hate me. Loud enough above 6000rpm that it sounds like it's unbaffled
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My welder had the shorty ready to put on his R100s. Glad I didn't get that one. Too open...it's just straight through with some wall screen. I'd probably still be farking around with 40/42 and 125/130's if I went that route.
Check my Sig for my setup. Happy to answer any other questions.
I posted a sound bite in my thread. Search for 18" quiet core.
Oh yeah....I love it. Quality product.