Every gt40p headed combo makes somewhere between 250 and 265rwhp setup. So you can say the tune added power, then again you can say something was wrong to begin with. A stock engine with full exhaust, pulleys, smog delete, timing and
k&n can make 225-230rwhp, so 238 as a starting number was off some how.
Imagine where you would be if instead of spending that money on a tuner, you purchased twisted wedges or afrs.
On a different note, I won't go much further no need to get in a pissing match with people that don't own cars that actually run and haven't in pretty much forever.
I prefer to help others spend their money on things that actually help, not just novelties.