Use the same spec for aftermarket.
That seems high, but...
I guess it is 140
http://www.camaro5.com/forums/showthread.php?t=33139
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"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety."
-- Benjamin Franklin
lib·er·ty
/ˈlibərdē/
noun
1.
the state of being free within society from oppressive restrictions imposed by authority on one's way of life, behavior, or political views
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