I would not recommend B-Quiet, I was very unimpressed with the result when I used it on my GS. It's super messy and once it's applied you'll never get it off.
The best stuff I've used for that specific application is Focal BAM. Cascade VB5 is also very good.
Haltech Factory Trained and Elite Certified / AEM EMS and Infinity Factory Trained Tuner / ECUTek Factory Trained Tuner for FRS-BRZ and R35 GTR / HKS Pro Tuner / Apexi Power Exel Certified Tuner
Proud to be a "hater" that defends Authenticity