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One swap that did result in more power was a set of Comp Cams roller-tipped Magnum 1.6:1 rockers that replaced the 1.5:1 rockers used last month. The performance gain was as much as 11 lb-ft of torque and 9 hp. This is attributable to the fact that the heads flow very well at around 0.500- to 0.510-inch lift, which is max lift with the 1.6:1 rockers. View Related Article
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