Unless you had a baseline, that dyno is pointless. Or unless this WAS your baselline dyno run. Should've just gotten the WHP. You can't measure the engine HP unless you physically take out the engine and dyno the engine itself. The numbers they gave you were just a guesstimate after factoring drivertrain loss into the equation, which they simply guessed. They could've made the numbers any way they wanted to make it look good/bad, etc.