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You usually can’t see the difference in camshaft specs by looking, but the disparity between the stock cam and our COMP replacement is evident to the eyeball. The stocker specs in at 0.497/0.467-inch lift (intake/exhaust) and 196/207 degrees duration at 0.050 with an LSA of 116 degrees. The XR281HR we chose has more than 0.074-inch extra lift (it’s a whopping 0.106 inch on the exhaust side), along with more than 30 degrees extra duration on both sides. It isn’t the biggest LS cam in COMP’s catalog, but it positively transformed our pedestrian truck engine.