Quote:
Originally Posted by goodhart
I am gonna try to keep that good old "factory seal" as long as I can, it worked pretty well for Hughes and Jim 
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Not a bad idea at all. My IX is now over 60k miles about 35k of which is with the FP4R's (stock springs, seals, etc.). I think a conservative rev-limit is what really saves the valve seals (fairly common weak-point of the 8/9 head). I set the rev-limiter to 7,600 when I installed those cams just to be on the safe side; the car did sit on that limiter quite a bit too during autocross when it didn't make sense to snap off another shift into 3rd.