Ever since I picked up the helmholtz resonated sport exhaust it’s been making a super loud high pitched noise exactly like a coke bottle. I don’t think it’s my turbos as they wouldn’t be that loud at all. Looking for a few opinions as to if it’s normal or not with this exhaust, & if it sounds good while going down. Been having very mixed feelings about the sound. Launch found here (And I know I rolled in the beginning)
SilverSafeSpeeder
I tried the Helmholtz for a bit but I preferred the 1st version of the Sport Mufflers. They were not helmholtz design.
I have PLM Helmholtz design. I don't have any type of whistling noise. At full throttle mine sounds more like a whoosh sound coming from the exhaust.
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That is definitely not normal. Is everything torqued to spec? Did you use the gaskets that came in the package or re-use the old ones that were already on the car?
I started off with the first Infiniti sport axleback and there was a tractor sound mid range. put a mic on the bumper to confirm it wasn’t just the speakers. from there I went to the ark grip cbe which also has Helmholtz and has sounded clean all the way through the rev range since. there have been others on one of the fb groups that have heard a whistle out back with the sport exhaust but no consensus was formed iirc.
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