Everyone, this upgrade in my opinion makes the car drive more neutral with more of a rear push coming out of turns and from a standstill. Easily one of my favorite upgrades I've done to the car, what a difference!!
Install was pretty straight forward, mine was spilling gear oil when we removed the old unit so we quickly had to swap the new controller in. Tighten two bolts, plug in the two connectors and good to go!
I gave my HPA Haldex controller a workout last weekend. Even the tightest and fastest corners are no drama. It makes me a bit afraid to find out where the limits are. Even when I drive aggressively - for me - the system makes me look good!
I've put about 10k miles on my R with the Haldex controller from HPA, and thought I'd post up my thoughts on it so far.
Went with the wireless switchable controller and only take it out of race mode every so often on longer highway trips. Other than that, it stays in race mode all the time. Lost a couple MPGs in fuel economy in race mode, but nothing that bothers me all that much.
One of my concerns was winter driving, this is a non-issue for sure. The car still performs well in race mode in snow/ice, and switching off ESC just increases the fun factor if you have space to play around in.
Can't wait for spring to roll around to put in some track time in the R! Considering swapping to the competition only controller considering how rarely I take it out of race mode.