If you've got any Ultra trim, you can fine tune your setup by changing the reduction nozzle ring.
The rings come in sizes: 88mm, 89mm, 90mm, 91mm, 92mm, 93mm, 94mm, 95mm.
We recommend getting multiple.
To order multiple rings, you have to select a (one) ring size and add it to the cart. Then repeat that process until you have all desired rings in the cart (you can't select and add multiple to the cart at once).
