You don't need the aspirin for ephedrine to be effective, caffeine is all that's needed.
If these dosages are correct then it should be as effective as the ECY stack, the only thing I don't like in there is the gugglesterones...not nice compounds.
Ma Huang 250mg (standardized 8% for 20mg ephedrine)
Caffeine (USP) 200mg
Guggul Herb Extract 200mg (standardized 10% UV guggulsterones z and e)
Coleus Forskohlii Root Extract 200mg (standardized 10% for 20mg forskolin)