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 E90 330i JB/TERRA modded - RIP
n54 135i AW/CR JB3 FBO 420whp 444wtq - 11.5 sec 1/4 mile @ 122mph - RIP
e53 X5 4.8is M///BLUE/M///SUEDE - 357whp 369wtq - The Snow Beast!
n54 135i JB/CR JB4 FBO - Tc Kline D/A Coils - 1/4 mile/dyno PENDING