1999 Ford Mustang Article at Automotive.com
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Below is an enthusiast article written by the automotive experts at Mustang Monthly. Anyone who has even a passing interest in cars knows how much power the engine in their own car has, or more precisely, the factory power rating of the engine. And those ...     read more
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Dynojet Power Commander - Horsepower In The Mustang World

rpm hp torque
3,000 131.2 229.7
3,100 136.6 231.4
3,200 141.6 232.4
3,300 146.4 233.0
3,400 154.7 238.9
3,500 163.1 244.8
3,600 169.9 247.9
3,700 173.7 246.6
3,800 180.0 248.8
3,900 186.0 250.5
4,000 192.0 252.1
4,100 197.5 253.0
4,200 201.0 251.3
4,300 207.5 253.3
4,400 212.5 253.6
4,500 217.7 254.1
4,600 223.9 256.4
4,700 228.0 254.7
4,800 233.0 254.9
4,900 234.9 251.7
5,000 240.9 253.1
5,100 243.2 250.4
5,200 241.0 243.4
5,300 242.3 240.1
5,400 242.9 236.3
5,500 244.1 233.1
5,600 245.6 230.3
5,700 247.0 227.6
5,800 250.0 226.4
5,900 250.9 222.8
6,000 248.3 217.4
6,100 248.0 213.6
6,200 245.3 207.8
6,300 244.5 203.8
6,400 235.5 193.3

Headers And Off-Road H-PipeThe headers and off-road pipe yielded a nice increase. The 5,800 rpm power peak occurred just a bit slower than the 5,900 rpm on the baseline pull. The speed at which the 283.4 lb-ft torque peak occurred was at a notably lower rpm (4,300) compared to the baseline (4,600). Note the power was impressively up at all points. For example, at 5,000 rpm, there was a full 20 extra horsepower on tap with the BBK headers and H-pipe in place.

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1999 Ford Mustang