My Review from audi sport forum:
More reading can be found at
http://www.audi-sport.net/xf/threads/s4 ... ch.247370/
The only thing I would suggest from past experience is that it is worthwhile obtaining the uprated clutch fork from ECS as the older one is more prone to bending as I found out on 2 occasions
https://www.ecstuning.com/Audi-B8_S4-Qu ... ES2211033/
REVIEW
I was in the same situation around 6 months ago and narrowed my choices down to either the Eurocode kit or the JHM kit.
I opted for the JHM kit as I was able to gather more solid information and was a little put off by the short life span (obviously dependent on driving style) of the Eurocode kit.
My initial review of the JHM kit:
Car has been running the APR stage 2+ software and hardware for just over 10,000 miles and the original clutch and flywheel had been holding up well until recently. Started to get sticky gear syndrome and was finding it increasingly difficult to shift into 1st gear and Reverse gear so knew it was time for a change.
Originally was intending on going down the OEM route and was quoted £1600 ($2500) for supply of clutch & flywheel along with installation cost. I am planning on keeping the car for a while so did not want the same problems occurring so decided to go after-market and started looking at upgraded alternatives (which there are only a few of).
After extensive research I ended up with the JHM Stage 3 Clutch and LWFW combo and had it installed around a week ago. Ordered from the UK and delivered within 3 days via Fed Ex from the US (Thank you Dru at JHM). The total customs charges and additional fees came to around £350 (or $550). So in total the clutch and LWFW combo plus shipping and taxes came to £1700 ($2660)
I had the kit installed at a local Audi/VAG specialist who I use and can highly recommend there work and was quoted 8 hours labour + master slave cylinder + gearbox seal. We agreed on a £550 ($860) fee.
The total time taken was around 10 hours (the extra 2 which I was not charged). So in total the cost of the Clutch/Flywheel and installation came to £2250 ($3530).
First impressions of the clutch and LWFW are extremely positive and the feel and bite of the pedal/clutch are extremely precise. It is a little bit easier to stall the car (only done once) but the silk smooth movement of the transmission has totally transformed the characteristics of the car and how the power seems to be delivered.
Review after break-in period:
After covering almost 1000 city miles I was able to give the clutch/flywheel some abuse over the last few days with some hard launches and some spirited driving. Cannot fault the setup whilst driving aggressively and it handled everything I threw at it.
It really has maintained almost all of the OEM drive-ability. As I mentioned in my previous post, the only time I have any negative feedback is when I am in the wrong gear, for example when in 5th or 6th gear travelling at 30mph then I put my foot to the floor. I experience vibrations that were not present in the OEM setup.
Overall I am extremely happy and would highly recommend to anyone who wishes/needs their clutch/flywheel changed or upgraded. Top marks to JHM
Review now covered over 6,000 miles
Clutch/flywheel still gets daily abuse and has never missed a beat. It definitely takes a little bit of getting used to over OEM.
As I stated early, I am sure both kits are well designed and will hold the extra power... I just wanted to make sure (or as much as I can) that I do not have to change the cluth/flywheel again hopefully.
Hope that helps you a bit.