Super Stock Horsepower Changes complete for 2nd half rating period 2011
Engine Make CID OEM HP NHRA HP New HP Years affected
Chev 396 375 405 399 68/69 Camaro
Mopar 426 425 500/507 505 68 Dart/Barracuda
Ford 289 210 213 210 64 Mustang w/auto
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