First thing you do is find out which GTM kit you have that will tell you were the filters are.
Next take a sample of your oil and send it to Blackstone for analysis that will help with telling you the condition of your engine.
3rd or last find a good tuner and get it on the dyno to see what power it is putting down and if it is crazy high you can dial it back which will help with engine life.
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2013 ZL1
754 rwhp 747 rwtq 
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