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Check the seat pressures VERY carefully. A lot of the Jap branded springs are pretty light. The BC (Brian Crower) have good pressures and well priced. I'm sure there're others that are good too.

I also have a set for my 33, using camtech 264/9mm and 268/9mm cams, Using PVS springs and retainers, new OEM lifters, HKS cam gear and timing belt, retaining VCT.

I also have installed them yet, so I cant comment on them in a RB25, But I had a set in my HQ ute with blown/injected 304, and never had an issue. Why I used them again.

They will be absolutely fine for what you need, they're designed for 10mm lift.

Allan's a good guy to deal with as well, give him a call or drop him an email and he'll answer any questions you have.

Has anyone got a link to the supertech valve springs for the neo head please

Have you had a look on the Supertech website?

e.g.

http://www.supertechperformance.com/s26918-nissan-valve-spring-kits?m=5331&ec=328&em=5449

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