Have you thought about the novarossi 21-plus 5. It would be a good match performance wise for the v-spec. I have a new engine on its way that i have been told would be a good partner to go with my v-specs i'll let you what it like when i get it.

p.s. I have now replaced to rear bearing in my v-specs both at about 2-4 gallons i replace the first one with a boca bearing and the second with a novarossi. The boca last for the rest of the motor the novarossi is still going strong but it wasn't replaced that long ago.

In response to the post below, i've driven a 21-plus-5 briefly to see what it drives like vs a v-spec. I have no experience with it bar that. i just put that suggestion out there as i love how the v-spec drives and the 21-plus-5 drives similar, so yeah obviously get some opinions on it if you want something that drive like a v-spec.