Two Brothers M2

[sk8snw8s]

Interested in the Two Brothers M2 bolt-on canisters in black. How do they sound (compared to Yosh, D and D)?
Are they easy to install, meaning just un-bolt my stock canisters and bolt on the Two brothers without making any adjustments to the F1 or any other calibration?
Are these go quality exhaust canisters?

[ranman]

i have a set in cf. love the sound its deep.the quality is supper. i did the marble mod. when i installed mine it stops them from backfireing. or do the par valve blockoffs.