I think with the size of the under seat area you would be able to hide the original silencer . I must say for the small increase in noise ,for me the benefits of replacing with the leov is worth it. I am a enthusiastic user of it's bhp and have noticed no difference except for the handling improvement.
yes the silencer is near 21 lbs. somehow someway that will be reduced. it will be my first focus after the body is done. I am considering cutting open the stock muff and rebuilding with lighter materials. if I am honest I love the way the stock exhaust sounds. and I am not crazy about loosing any torque with aftermarket muffs just to save 10-12 lbs. we'll see how we end up.