Many thanks for your order Yannis, I have already processed and your cans will be with you in 7 working days.

Regarding the paste I would say not really because even if there is a small leak, rest assured that withing a few days the exhaust soot will seal it automatically filling any possible gap, just make sure you fit them properly, its not that difficult, just don't fully tighten the clamps untill both cans are aligned with the bike's fittings and you are happy that they are both secured.