It says he EXPECTS a 20% power boost. Then the author states the actual numbers for it being 20% (246hp and 240tq). I would say it will have more than that. Plus this does not include other things such as exhaust and CAI.Need more incentive? GM Performance hoss John Heinricy says he expects a 20 percent power boost from the Stage 2 kit “when all is said and done.” That’s about 246 hp and 240 lb-ft, if you’re keeping score.