My 1st mod for 2009: RPI GT exhaust for 525i
01-27-2009, 04:36 PM
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I got the RPI exhaust today and I love it. There are no pix of the exhaust on my car but I have the dyno sheet. I will post pix when the car is ready for pictures.
Joe from RPI will explain in more detail what the dyno numbers means. We compared the Magnaflow exhaust to the RPI GT exhaust.
Joe from RPI will explain in more detail what the dyno numbers means. We compared the Magnaflow exhaust to the RPI GT exhaust.
BTW! 
01-27-2009, 07:40 PM
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Do they make quads for the E60? I want to change the magnaflow out on my car soon aswell, anyone know if straight-pipes with a custom x-pipe will show any gains. thanks
01-27-2009, 07:42 PM
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John's graph shows an increase of 6 lb-ft of torque from 1700 - 6400 rpm and peak 5 hp increase @6100 rpm.