So considering I already have a SYE, it would just mean adjusting the DS (if it is different enough to require it), and there should not be so much vibration? Is anyone out there using an 8.8 that would be kind enough to give me some reference as to weather this set up would cause vibrations at highway speeds or not? If I get one for a decent price, I may go for this one instead of the D44 and just leave the D30 up front... It seems both should be ablt to handle up to 35" with lockers (provided I keep the 4 banger and dont do anything stupid), right?