We took our stock 2008 Pontiac G8 GT to the dyno today to try and tune it in for some extra power.  The stock pulls showed a RWHP of 291.6.  After our test, pulls, and tuning adjustments we drove away from the dyno with 312.6 RWHP on an ultra conservative 12.0:1 air fuel ratio.  While we had a peak numbers gain of 21 hp. There is close to a 30 hp gain in different parts of the curve.