Mustang dynos suck because they give low numbers. Go to the track and get some 1/4 mile times. The trap speed with tell the real story. Plus it's a whole lotta fun

 

I think its funny that this idiot doesn't ask before he talks crap, 284 h.p. before headers and mufflex exhaust... after parts, and tune 305 h.p.............. lost 5 h.p with slp air temp module. I think theres more h.p. there because of my high torque numbers, but my tuners just couldnt find it. The problem on this site is you have everyone telling there dream dyno numbers instead of real numbers...... anyway that was my result oh and the car ran 12.66 in 1/4 mile on dyno.

 

No reason to start name calling. You could have offered the before numbers in your origional post. Were the before #s from the same dyno?