Post by
SteveTheTech »
https://forums.nicoclub.com/stevethetech-u103802.html
Fri Jun 05, 2009 2:29 pm
I understand what you mean, some of the clutch plate springs in some of the models are pretty stiff. However I do not think you will be able to update your current Hydraulic Activating (Slave) Cylinder with the new style that is mounted to the transmission input shaft. It uses a different setup from the top down. The best thing I can recommend if you are looking to retain you factory noise level is when replacing go with the OE one (it's pricey but quite) if the flywheel is in good shape (no heat cracks or discoloration) you can replace the disc and cover and the results should be different. There is (as far as I know) no defining characteristics are labeled on them but I would imagine there is a slight varience between years, typically the 04 w/ Brembos always tend to have heavier (stock) clutches, but I have seen other years also have very heavy pedals and other models in the same VIN series have very light ones.
The aftermarket flywheels are typically a single mass as opposed to the OE dual mass energy absorbing model used originally. Members and Moderators (Joe603) here can attest to the noise that is made from a single mass or "lightweight" flywheel and the engaging pressure is usually increased in aftermarket models.