If you look at the disclaimer at the bottom it explains vaguely how they came to their power estimates. If it were my money id go for a different more reputable chip.
__________________ Black 2006 GT T-2 Torsen Diff, 3.73 gears, FRPP 90MM CAI, SCT X-Cal 3 tuner/ Speed Inc. dyno tune, FRPP catbacks, Steeda Triaxe w/ Hurst stick and T handle, SVT strut mounts, FRPP strut brace, Steeda UDP, JBA long tube headers, JBA O/R H-pipe, CHE LCAs, CHE anti-squat brackets, Steeda adj. UCA, FRPP blue valve covers
304 rwph, 322 rwtq
1968 Convertible PROJECT candy apple red 289 2V (swapped to edelbrock 600 cfm performer and performer intake manifold with a mild cam) | 
SLR chips really work? 
