[Masteryota]

The inside looks good, leaving the outer portion of the resonating material will result in a lower tone and won't be too obnoxious. If you want to leave the tailpipe section on the cap, then at least cut the inner portion of the small pipe off. Additional back pressure is not needed on 4 stroke engines, and leaving that pipe on the inside will only cause turbulence inside the can, and will likely flow no better than before. The smaller hole, however, will add just enough restriction that it won't harm the torque curve of the engine.

That honeycomb looking piece appears to be a low grade catalytic converter, which is used to clean up the exhaust chemicals. Hard to believe they are hitting our buggies with them now.