The SSRA with the weatherstrip sealing in the fron of the airbox versus without it? Is there a beneifit either way?

Is the Corsa woth the extra money versus a Magnaflow, LMII or Random Tech catback which are all SS? Any dyno comparisons?

 

I seal mine with a homemade seal plate to get the most out of the ram air effect. I also built a block off plate to block off the ram air if I needed to.
I played with this at the strip and going from ram air to factory slot lost a 10th of a second and 1 MPH. And going back to ram air got it back again on back to back runs. SSRA works.