Hmmm, 300hp, sounds about like a Stage 3 kit, if so, that can give an SRT-8 a run for its money, so yeah, if he's being truthful, he's right, it would kill you, or a 5.7.
Ask him whats he's got done to it. Even stock, its a straight match for a Hemi car, but lots of SRT-4 owners use ricer math, sadly, thinking that mods add like normal.
CAI + 5hp
Catback exhuast + 10hp
Cat delete + 10
And they think they have 255whp. And someone told them that 18psi means 300hp, so thats the number they use. Once they start with boost controllers, and other stuff, hard to say, its just as easy to add bost but not power.
If he stayed with Mopar Stage kits, its easy, they make a set amount of power, no tuning required.And the Neon SRT weighs about 3100lbs, so yep, its lighter.
Stock power is about 230whp, about 50whp shy of a Hemi, but each 100lbs is worth 10 hp, so thats about a 100whp bump. But then subtract for FWD traction problems, and they end up about even.