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Originally Posted by greentrbo95gst
Is RPI planning to design dp's as well? I would love to be able to hear the turbos spooling.
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Yes RPi is planning on designing down pipes as well. Like the E60 M5 headers they will be built with quality and power in mind. Currently BMW is not yet allowing people to privately purchase just the down pipes from their parts ordering system. So this has been obstacle in starting development of the RPi GT down pipes. RPi is instead planning in removing the down pipes from their own F10 M5 for product development. The RPi down pipes will completely remove the primary cats for great exhaust note decibel level and much greater airflow thereby creating much more power. The projected difficulties right now are that BMW uses cast iron for the stock down pipes, which is great because it is extremely heat resistant and strong. Trying to use another alloy that is lighter and just as strong as cast iron will be a challenge for development because of the extreme heat generated in that area. You can expect that RPi will release its GT down pipes next year. So stay tuned!
