100% one of the best modification I have done to my car so far! Worth the money! Should have come with the car standard!
I’m a little bit late to the party and had my reservations to purchasing the Quaife as obviously it’s not a cheap add on but saying that let me add I had issues with bad under steer prior to having the quaife fitted and even running on fairly cheap tyres I have pretty much lost all of the under steer so where prior to the quaife being fitted roundabouts where mainly a front end slide let off let off let off now are no longer, it also has a noticeable Traction gain putting the power down. A definite recommend for any other mk7 Fiesta ST owner especially if your running an increase in WHP.
A definite big improvement over the standard diff, this is a must have if you're running the M230. Big thanks to Ryan, Fred and the team at Mountune HQ, superb customer service as always.