Ok, I guess max was an exageration. Also your buddy didnt have just an intake and an exhaust on a Supercharged cobalt and have 299, cause if he did, HES A GOT A SPECIAL ONE, or he has a useless motor because he probably had one of the most unsafe tunes possible. Maybe if he had the turbo’d balt. I would do some research before spouting off like that, or your thinking wheel. Remember supercharged cobalts came labeled at 215hp from the factory and thats basically what they were putting down at the wheels, and if your buddy had an intake and exhaust that added 84 whp, i dont even care if it was a good tune. He best be selling those parts or telling people where he got em cause the guys on cobaltss.net would love to see those 
Cause its a tough feat to get to 300whp on that stock m62 charger. Oh also every dyno is different and those sure sound like some juiced numbers for the shop to make the customer happy. I would love to see this car and dyno chart in person though, Id be astonished and floored if its true
Mine was moded to the max on basic bolt ons not doing heavy engine work and such, or moving to a twin screw, or TVS.
Its also real not read. And considering I was comparing cars in the same class on quality, getting a corvette or new camaro yes would be better then a civic, but we are talking sport compacts. Thanks for the input though 