yes, ive got the 25 mm h&r spacers on my rear 20's.i would spend the little bit extra because the spacer bolts into the original bolt holes,then the wheel bolts directly into the spacer.plus it has the centering wheel mounting ring to assure a perfect and solid mount.the cheap extention spacers that use longer bolts running through metal discs dont let you use the centering ring on the hub.................theres no doubt the nw intakes are high quality,i just saw on another thread a dual intake welded up for the na xf. a nw dual one would be oh so sweet,especially with a custom color option. hint hint