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The Xtreme Energy XR274HR is a retrofit hydraulic roller cam (224/230) intended for high-performance street use. It’s specified for 9:1 compression and works with 3.55–4.10 gears, with recommended stall speeds near 2000 in 440 engines and 2200+ in 383s. The profile balances street manners with added responsiveness for tuned small- and big-block builds.
COMP Cams Camshaft CRB3 XR274HR-10
