I just put one on my 85.5 944NA recently, it helped pedal response greatly. I did have to back off my cable tension after the install, as the new disc put more tension on the cable and bumped my idle to 1100 rpm. It was no big deal.
The difference is noticable, the car responds better taking off from a dead stop, there is no "vague" pedal feel the first 1/2" or so of pedal travel anymore. The difference is also somewhat noticable on the highway in 5th gear around 60mph, step on the gas a little and the car responds faster. I haven't noticed any drivability loss as some have mentioned. But I kept my stock one just in case.......
tifosiman
85.5 Guards Red 944NA
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