Got Borlas and a tuner with Lund tunes already. Noticed on high speed runs that I got significant vibration in the drivetrain when I let off the gas, decided the drive shaft needed to be upgraded prior to the gears.
1st Time at the 1/4 Mile Best E.T out of 4 passes (Without Ported Intake Manifold): Uncorrected 2500DA[email protected] MPH w/ a 2.17 60".Corrected[email protected] MPH
Ford Racing 4.10 Gears/ Borla S Type Axleback/BBK Chrome Equal Length Shorties/Lethal Performance Catless H Pipe/JLT CAI/Ported Upper and Lower Intake Manifolds/Steeda 91 Octane Tune/ SR Springs
I have a dynotech shaft and love it. I don't know I noticed more power but definitely noticed how smooth the power delivery is and it also smooths out regular driving. I was underneath the car recently saw how awesome it still looks.
I'm an auto as well. Very smooth, like you I feel no vibration decelerating from high speed. There seems to me to be no difference in power, but since I'm running an aggressive Lund tune I probably wouldn't be able to tell anyway!
Folks ask me all the time on YT if the longtubes are worth it.... YES!!! Lol. Gears are still the single 'best' mod thus far, but the headers were a vast improvement, and rather damn easy to install as well!