Any muffler shop should be able to order any tip you need. Just make sure they dont charge you an arm and a leg for it.
The intake helps throughout the rpm range, so yes it will help the down low torque loss. But, like Montreal said its barely noticable in the first place and the car does pull harder at 3k.
So, ENJOY =) =)
M-tech 330i JB/TERRA modded - RIP
n54 135i AW/CR JB3 FBO 420rwhp 444rwtq - 11.5 sec 1/4 mile @ 122mph - RIP
e53 X5 4.8is M///BLUE/M///SUEDE - 357awhp 369awtq - The Snow Beast!
n54 135i JB/CR JB4 FBO - tc kline coilovers - 1/4 mile and dyno PENDING