1) Where is the best place to purchase and why?
:blabla: I got mine through Wide World of Cars, Spring Valley, NY. They arranged for drop shipment right to my house!
2) Have you ever had the SES light come on as a result?
:blabla: Never had the SES light come on!
3) Can the dealer install them and typically how much for installation?
:blabla: I installed mine myself, except I could not get the forward pipe clamps tight enough (broke the bolts twice). I had my local dealer (BMW of Sterling) weld those two connections completly ($500). All is tight now!
4) How is there an increase in HP and torque aside from the weight difference from stock?
:blabla: I did other mods at the same time, no meaningful dyno results. However the sound is the best!
Good Luck
:blabla: I got mine through Wide World of Cars, Spring Valley, NY. They arranged for drop shipment right to my house!
2) Have you ever had the SES light come on as a result?
:blabla: Never had the SES light come on!
3) Can the dealer install them and typically how much for installation?
:blabla: I installed mine myself, except I could not get the forward pipe clamps tight enough (broke the bolts twice). I had my local dealer (BMW of Sterling) weld those two connections completly ($500). All is tight now!
4) How is there an increase in HP and torque aside from the weight difference from stock?
:blabla: I did other mods at the same time, no meaningful dyno results. However the sound is the best!
Good Luck