Development is still under way but it sure looks promising :thumbsup:
"Our developement work on the headers and metallic cats now stops, and it will continue after Aug. 21, possibly on a M6 car.
I can anticipate you that the stock engined M5 car we worked on, does have an impressive 530 Hp (engine hp) , and that our cat-back system lets it jump to almost 544 Hp. Unfortunately, this gain is concentrated higher in the powerband, mostly from 7000 to redline, as the torque curve at low and mid rpm is almost unchanged."
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"Our developement work on the headers and metallic cats now stops, and it will continue after Aug. 21, possibly on a M6 car.
I can anticipate you that the stock engined M5 car we worked on, does have an impressive 530 Hp (engine hp) , and that our cat-back system lets it jump to almost 544 Hp. Unfortunately, this gain is concentrated higher in the powerband, mostly from 7000 to redline, as the torque curve at low and mid rpm is almost unchanged."











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