would like to get anyone comment regarding these 2 exhaust.

I have seen the zerosports world league exhaust model but it seems there is something in the muffler and the midpipe that could block or restrict flows? The exhuast is quieter than the tanabe Hyper medallion systems.

Anyone uses the tanabe hyper medallion on the a classic? who does it compare to other brand of exhaust? hope tp get your opinion as i plan on changing it before tuning the upgrades turbo if any of these exhaust would restrict

 

anyone??