I had the RPW Slash (SlashNess) pipes and made 106 ft-lbs at 2200 rpm. They do kinda stay flat until 3200. The Thor pipe is very linear (curve looks like an arc) after 2500. If you find a pipe that does better on average torque across the tach than the Thor, BUY IT.
110 Cubic Inches -- S&S stroker crank/Lloydz Big Bore, 11:1 Wiseco pistons, massaged stock
heads, S&S .495 cams, valve springs & retainers, Torque Tubes intake, stock throttle
bodies, RPW Thor pipe, Lloydz ECU, PC-III, Rivera Pro clutch spring, 31 tooth pulley w/Buell belt.