Quote:
Originally Posted by 571 M3
What's your current HFC set up? HFC with res? Asking because sometimes having a very aggressive xpipe paired with a tamed back section will produce lots of high-pitched rasp. So switching to sport might not help. If you have 2 HFC and 2 resonators then it will be fine to make the switch.
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Thanks, i have the valvetronics with 2 hfc in the oem primary location and 2 resonators in the back. Design is similar to bimmerworld with X moved up.