Is Moton also AST?

Halfkiddio

From what I remember however, the 4100 series had some pretty substantial reliability issues. They have had issues with the shocks leaking after one season, as well as failures in the design department.

Thats off the top of my head and some quick google searching. I know JRZ's will last 4-5 years with no rebuilds needed, as Sharif has a set on his personal GTR that have yet to leak or go soft since he put them on 4 years ago. He also has the older design that doesn't have bump stops or dust boots.

cv129

I politely disagree here. I would refrain from making such general statement.

Amount of time is not the determining factor. The combination of type of usage and amount of miles determine needs for servicing/rebuilding. None of the high end stuff, if really being used, can retain its performance for that long without any servicing.

For the competitive guys, shock rebuilds are part of the game. Oil degrades, shims and seals weaken due to heat and usage, etc, no way around it. However, there have been cases where people don't even feel anything wrong when shock oil had turned into goo. Go figure (not implying sharif).

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Setrab | RE-71 | SPL | JRZ | Nismo | ARK | Whiteline | RacingBrake | CJM Oil Pan | Ti shield

Halfkiddio

I will agree with that. I admit that was a general statement based on one person's experience, but I also know JRZ's will last a long amount of time given the abuse they can receive. They can wear out faster, as it all depends on the specific circumstances of a particular car. Motorsports teams that rebuild them every couple events have the money to support that level of maintenance, but they are also making sure the driver can get every .001 out of a lap. For the normal user, you don't need to worry about that thousandth of a second per lap, so you can go longer in between rebuilds/refreshes.