I am looking for a quad setup but i'm trying to figure out if the quads will reduce hp? I feel like i've read that somewhere....and also I plan on doing a few other performance mods like JB+ or JB3 plus intake...would that matter? Thanks and if anybody could post possible options it would be great....I might just have a local shop custom make one if it doesn't reduce hp/backpressure...it will probably be cheaper and since its a lease I don't care about how long it lasts as I'll probably put the stock muffler/setup back on before I trade it in....any ideas? Thanks a lot

 

member Macfly has a Remus quad exhaust on his 535 but is not an xi I don't know if that makes a difference.

 

I believe there was a member that had that done and was parting out his stuff on his 535