I didn't think I would say this, but... I actually don't like that as much as the separate exhausts on the sides. The proportions are off on the rendering above.
I like the square tips. Actually the speedway tips from B & B would look quite nice. The rear end is fairly busy and adding more bling makes it look like it was assembled piece meal, just IMO. Sometimes less is more.
I didn't think I would say this, but... I actually don't like that as much as the separate exhausts on the sides. The proportions are off on the rendering above.