I'm surprised to hear that you've gone away from NRS. My current engine is a series 5 stock standard, only minor casting flash removed from the intake ports. Rebuilt by myself all OEM mazda components. Great powerband, more then 2 years of abuse and road trips at 350+rwhp, 121+mph trap speeds in the 1/4, nearly 50,000kms of use......but I'm swapping in an REW that I will be using NRS seals with.
Have you changed due to some issue with the seals or to prove the durability of the OE components? From my findings the OEM items need not to be proven, but I'm moving to NRS to facilitate a longer overall lifespan of the engine at elevated power.....bad move?
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Originally Posted by djmtsu
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Last edited by classicauto; 04-29-2011 at 10:12 AM.
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