Now that I can reply, here's my experience. So far. I had an MK5 that was APR Stage 2 with Neuspeed P-Flo intake and short ram, APR 3" downpipe and 3" high flow TBE. The TBE was custom pipes on a cheap muffler. Easy flow.
The MK5, I got it with 49k on the odometer, I went to stage 1 at 55k and stage 2 at 60k. I had to get the clutch replaced around 80k, and it was the original stock clutch.
After some giant mix up, my mechanic ends up replacing what needed to be rated for 350 plus bhp, with a stock clutch on my stage 2 MK5. I ragged the hell out of that clutch to beat the 24k warranty so I could force the mechanic to put in a stage 2 clutch but nope. The stock clutch on my stage 2 MKV stood up to the worst possible driving conditions and was still going strong at stage 2, 35k miles after I had the clutch replaced.
The stock clutch took stage 2 on the MK5. The original stock clutch took 25000 miles of stage 1 and 2 combined, and the stock replacement took at least 24 k of intentional abuse at stage 2 and it took it. If my math is messed up, I suck at math.
Now, I'm driving the MK6 and I just got it flashed to APR stage 1 but am bone stock otherwise. The clutch is the original with 65k miles on it, and I just went stage 1 with my MK6 a week ago.
I am thinking the clutch will need to be replaced around 80 or 85k which is normal for me with GTIs so far but for now, my stock clutch with 65k (that I know of, previous owner may have put in a new clutch I don't know) on my MK6 seems to be holding up with the jump to stage 1.
As long as my tires aren't spinning or hopping, the clutch is grabbing fine. I'm re learning the finer points of getting "to know my car" and it feels like the stage 1 tune on the MK6 is more aggressive in 1st thru 3rd with a lot more low end torque. I don't recall my MK5 being as "aggressive" at stage one.
These cars become different from stage 1 and up and it takes about a week to "re learn" how to drive the car so you can drive aggressively and not beat the hell out of the car.
Now my tires on the other hand...
I should point something out that I've noticed. When I went to stage 1 on my MK6, naturally I launched it a few times because why not?
I will say that my tires need replacing and the wheel hop and wheel spin on my MK6 is pretty bad with stage 1 and if I do a launch where my tires are spinning in most of 1st and most of 2nd, it almost feels like the clutch is slipping when the tires are hopping or spinning. I'm assuming that is because the clutch can't grab when there is no traction but please correct me if I'm wrong.
I can now do the same launches without breaking my tires loose and I've noticed that as long as I have traction, the OEM clutch holds on my stage 1 MK6. I tested the clutch after the low traction launches to see if I was experiencing slipping by driving out of 4th gear, followed by driving out of 6th at 30 mph. No slipping.
Sorry for the long post, I just wanted to add a few things regarding my experience with the stock clutch on 2 different GTIs and throw in some info about my driving habits and what I noticed the stock clutch doing on low traction launches.
The bottom line is this. The stock clutch that came with the GTI will eventually burn out. Some people experience it at 20k, some people get over 80k out of their original clutch. All of the "generic" answers are the right ones.
In MY experience, the stock clutch does okay with stage 1 and stage 2, but it's eventually going to go and when it does, I would talk to the mechanic and let him know that the car is tuned and that you need a clutch that can handle the extra power.
What I'm saying is that just because I've had overall good experiences using the stock clutch at stage 1 and 2 on two different makes of GTI doesn't mean that you will and just because the stock clutch seems to be holding up okay under stage 1 and 2 doesn't mean that it's designed to.
Hopefully I'll be able to get another 15 to 20k out of this clutch before I have to upgrade.
Sorry for the long post. I added as many details as possible in an effort to paint a bright picture on this subject.
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