Originally Posted by Angus
My truck had a Borla system on it when I bought it and the resonance was unbearable.
You wouldn't by chance still have that borla, would you? :-)
I have NRP on two 4.2 RRC's and Magna on the third. NRP is definitely more refined! Magnaflow on the 90 as well. Loud and fun around town, but drones terribly at constant speeds, especially on the highway! That's why I use the DC's.