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Originally Posted by PREDATOR-Z  TR 224 has a 50 variance rate on intake, XE-R is 49 and XE 53.
Hardly what I would call non agressive and "easy" on valvetrain
The 222/222 I forgot, but either XE (high lift) or XE-R |
Hammer is XE high lift lobes. As far as the TR224 goes, its a whole lot easier on the valve train than the "latest and greatest" XFI/LSL/LSK lobes that everyone seems to be infatuated with. Not only that but being that its in between the XE-R and XE lobes, I'd say that's pretty "non aggressive", wouldn't you?
I mean, a simple set of 918's or PAC 1518's and you won't need to worry about springs for 40-50k miles.