10-15 was dyno'd on stock 6.0 gto...i'm assuming closer to 10 on stock truck...closer to 15 on mod'd one.


As far as the system thing goes... i upgraded to a 145amp alt, and ran better cables, and my lights still get DIM at stop lights with stereo going...but are 100% normal once i start driving. Worth it IMO...and according to the ass-dyno. Was NEVER able to spin the 35's until i put it on, now i can squeal em from a dead stop.