Simplify the following text for a Grade 4 native English-speaking person.
Original: It used a Rayjay ATP turbo kit to build 0.35 bar ( 5 lb ) of boost , bringing power up from c. 90 h to c. 105 h. However , it was only marginally faster than the standard model .
Simplified: It used a Rayjay ATP turbo kit to build 0.35 bar ( 5 lb ) of boost . This raised the power up from 90 h to 105 h. It was only slightly faster than the standard model .