They look great and you will notice a big difference up top in the rpm range without the cat. Give us a report when you've had a chance to blast around. Have you considered getting a new can? The stocker is pretty heavy and big but I do think it flows pretty well. I just put the baffle back into my Akra race can. It was a touch too loud and I couldnt here those lovely boxer valvetrain noises with it out. I don't think theres much in the way of power loss with the baffle in. All the extra power comes from getting rid of the cat.
'13 Ducati Diavel AMG #163
'09 KTM 65XC (son's ride)
Gone: '10 Ducati Multistrada 1200S, '11 BMW R1200GS, '10 BMW S1000RR, '08 BMW HP2 Megamoto, '07 KTM 950SMR, '05 BMW R1200GS, '94 BMW R1100R