Meet the latest patented technology that adheres to the world's increasingly stringent environmental regulations, at the same time enhances performance to another level on your BMW B58 Z4 M40i, M140i, M240i, 340i, 540i, 740i, X3/X4 M40i xDrive. In comparison to commercially available linear frustums, the "eddy catalytic technology" adopts an arc-packaging method. The turbine emissions process produces a vortex effect which purifies the exhaust gases while maintaining an equal amount of back pressure. When compared to a variety of conventional straight downpipes, the patented eddy catalytic technology can effectively increase horsepower and torque. In the lower rpm you will be immerse with vast amount of torque until you reach higher rpm where the vortex effect really comes to life and opens up the Catalytic, resulting in a performance similar to a 100 CELL Catalytic. However in the lower rpm, the catalytic will produce efficient and clean emission similar to a 400CEL Catalytic and produce no Check Engine Lights, completely error free.
STONE Exhaust's Eddy Catalytic Downpipe utilizes their patented "eddy catalytic technology" which adopts an arc-packaging method. With its unique internal design, the downpipe produces a vortex effect which purifies the exhaust gases while maintaining an equal amount of back pressure. When compared to a variety of horsepower tests and straight downpipes, STONE's eddy catalytic technology can effectively increase horsepower and torque.
Features
- Patented O2 sensor technology design provides real-time data performance by accurately sensing every rotating displacement.
- No more delayed in power delivery
- Using one of the rare noble metal to help efficiently filter out exhaust gas.
- Computer simulation to obtain the best diameter.
- Special 3D design to achieve 100% OEM fitment, no modification required.
- SUS304 Premium Grade Stainless steel.
- Dual Cross-Welding Technology providing substantial increase durability at the turbo Flange.
