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116 0111 Build Stage3 Z

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116 0111 Build Stage3 Z

Build Your First Engine
Stage III: 352 hp for $3510
For Stage III, we bolted on a set of Holley Street Avenger aluminum cylinder heads (PN 300-579) with 2.02/1.60-inch valves and 60cc chambers. They're set up for stud-mount rockers, so we also swapped on a set of Lunati 1.6:1 roller rockers with polyloks. The taller rockers require taller valve covers, and Holley recommends Ford Racing PN M-6582-E302; Westech just happened to have a set on one of Hot Rod's engines, so we scammed them. Result: 352 hp at 6,400 rpm and 328 lb-ft at 4,500 rpm, a gain of 43 hp and 4 lb-ft. Grand total: $3,510, or $9.97 per horsepower. 
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