not too noisy

Those glasspacks are doing little to nothing to quiet the exhaust. I really like straight through mufflers on their ability to quiet the exhaust without effecting too much performance vs a chambered style muffler (Like the Dynomax Ultraflows or Magnaflow mufflers), but the glasspack style is more like a race bullet in that the case doesn't have enough packing to muffle any sound. I'm not sure if the Summit turbos are straight through or chambered, but I felt like my engine was louder with a chambered muffler vs a straight through.

Out at the tail, I wouldn't think as much packing/quieting would be required?
Here's a pic of the inside of the Summit turbo.

sum-631122_sn_xl.jpg