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Old 07-24-2018, 10:11 AM   #2
2013blackgt
 
Drives: Sedan
Join Date: Feb 2013
Location: Aurora
Posts: 124
I had Katech install their stage 2 LS7 package on my z/28 and they said my valve guides were out of spec. I don't have the numbers though, they never gave them to me. Fyi, my car had 7,800 miles on it when they did the work.
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