Over the weekend I installed my Spohn Torque arm...Which caused me to have to weld me some Flowmaster right off the headers (took off my 3 " true duals, x-pipe,flowmaster,setup off due to New Torque arm)...And had my ET streets Put on my Torque Thrusts ((16's)From the 2000 Z wheels I previously had them mounted)....I went to the track Last weekend....And ran 12.5's all night long with 1.8 60's at 108 mph every pass...After all the changes this weekend I was running 12.7's at 106mph with 60's 1.74's??? What would cause me to Loose the MPH??? The ET's on the hefty TT's ??? Torque arm with too much Pinion angle ( Got confused on measuring...So got the pinion Down just a bit) could it be the mufflers right off the headers, Or the better 60's???? It wasn't the DA it was about the same both nights.....What do you guys think....If I could send someone pics of my pinion angle can someone tell me what it is set at???