Holden Performance - Yella Terra Stealth Rocker Arms Durability

How durable are these rockers compared to the US GM Stock LS6 steel roller fulcrum rockers? The Yella Terras have been in use in Australia for years, so as a potential user from the states, I'm curious how many miles you all have experienced using the 1.7 rocker arm set ups. Most US mechanics have no experience in the Australian products so any insight from those of you who have used this for any extended period of time would be most appreciated.

Any problems with stress hardening of the aluminum? I want to install these on my daily driven Z06 on a set of AFR heads with a cam in the 220/224 @.50 .568/.575 115lsa range.

The need for speed crosses all borders and cultures.

Thanks and cheers!

I have not yet used them, but the yellow terra r-rockers have been around for 30 odd years. If i had the money i wouldn,t hesitate to buy. they are a top aussie product.

I know there not the same as the stelth rockers but i have a set of yella terra roller rockers on my holden 6 ,Stud mount(1.5) 3/8" YT 5007.I fitted these to the motor when i built it in about 1990 and was using this car until some time in 1999 when it was taken of the road to start some restoration work.The rockers were working fine when the car came off the road and had never given any troubble.Thought i would post a coupple of pic's of the car as it looks at the moment.
Arron

I have had these roller rockers on my LS1's, Cams I have used them on vary from 230/224 580/560, 234/238 610/610, 246/248 630/630 and they are great, lots of guys over here use them and you can't go wrong with them if you are retaining a Hydraulic roller set up, they don't and wont do roller rockers for solid cammed LS1's.