The offending mag never printed a correction , the correction came from another mag from a different company , plus at least one big name tech author denied the numbers were inflated many times when others said the numbers to them were inflated.
The outing came when the other mag decided to use a new facility for it's engine dyno contests. The year we did the contest thru moparts the engine that was the top dog at the prelim we were at gained 50 or 60 hp on the west coast dyno with absolutely NO CHANGES done to the engine .