ARMYTRIX Stainless Steel Valvetronic Catback Exhaust System Dual Matte Black Tips BMW 3-Series | 4-Series F3x 17+To harvest the full potential of the BMW engine, we utilize quality T304 stainless steel, forged with the most advanced technologies and by the highest standard, to build our valvetronic exhaust. Meticulously engineered, the system handles an increased volume with ruthless efficiency. The refinement and amplification of power and sound alter the entire identity of the vehicle. Upgrades to HP and torque provide more freedom than ever and the auditory

- Rear Spring Rate: 246 in/lb

Turn your Track Edition into a Touring Edition

Computer designed to ensure that wire stress levels do not overpass the limits for long durability under extreme conditions and harmonics are well under control

No wiring modifications or extensions required

Cold Air Intake Kit improves induction into the intake manifold and is a direct replacement for the large

an Audi TT225 MAF and Green coolant temp sensor

where ambient cooling air removes the heat

Daily drivability with a Track soundtrack

Substantial Power and torque gains - with matching IE ECU tune Bolt-on system - mates to your stock turbo flange 1/16" thick 304 stainless steel piping - long lasting and worry-free performance Thick turbo flange - 16mm flange prevents warping and leaks High flow Cat - reduces emissions and unwanted smells Interlock core tough flex section - allows engine movement without failing or cracking 3" to 60mm adapter - easily adapts to your stock exhaust system All install hardware included - no last minute trips to the hardware store

central and rear resonators to keep overall volume to an acceptable level

follow these recommendations:

AUTOPART INTERNATIONAL