There are a few options to look at on
www.discounttiredirect.com. You can search by tire size (ie 275/40/20 for stock) and view tires of that size and just look for tires with a higher utqg rating. The higher the number the longer they last usually.
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2010 Camaro 2SS/RS LS3
1093/1066
416, AGP 6262, E85, Cam