Here are the dyno results following the airbox removal, K&N pod filters, rejetting, head porting and skimming to my Thruxton. The dyno graphs compare TORS and Predator exhausts.
The main jets are 138's with stock pilot jets. The needles are raised with one shim.
The Torque and Power dyno graphs show the TORS curves (RED) and Predator curves (BLUE). Maximum power and torque are similar for both exhaust systems. The Predators do give more power and torque almost everywhere else. The huge dip in the torque curve with the TORS at 3,500 to 5,000 rpm is no longer there with the Predators.
The Predators also give a weight saving of about 2kg and sound superb.
TORQUE: TORS 61.3, Predators 60.5 ft/lbs
POWER: TORS 70.6, Predators 71.0 bhp