Putting this on my "if I gotta replace the rear differential" file. 10% more real axle torque should show up nicely on the butt dyno especially if the VTEC threshold can be lowered well below 6000 rpm. I doubt any of us are overly concerned about the consequent increase in fuel use. Aren't there ways to correct the speedometer?

-- Chuck

 

Modifry used to sell the Yellow Box. I bought one when I had the 4.56 rear installed, and it works very well in correcting the MPH displayed.

This is the original - I'm sure if Bob made some adjustments to the ones he sold.

https://www.yellr.com

 

out of every mod i did on my old AP1, this was the best. unlike a lot of things you can tell the difference. couple it with a lightweight flywheel and hooo boy it was rev happy.