![I did the golf tee mod (hopefully the right way) on my 435i because of annoying squeal of exhaust flap when riding in sport mode. It's temporary because I will be upgrading I did the golf tee mod (hopefully the right way) on my 435i because of annoying squeal of exhaust flap when riding in sport mode. It's temporary because I will be upgrading](https://i.redd.it/bl2a822mcx451.jpg)
I did the golf tee mod (hopefully the right way) on my 435i because of annoying squeal of exhaust flap when riding in sport mode. It's temporary because I will be upgrading
DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod. - BMW 3-Series (E90 E92) Forum
F30 Golf tee mod, Clamp alternative to Wire. - BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST
![Golf tee mod / Exhaust valve mod + Free Exhaust Sound Hack Mods for Dual & Single Muffler Cars Loud* - YouTube Golf tee mod / Exhaust valve mod + Free Exhaust Sound Hack Mods for Dual & Single Muffler Cars Loud* - YouTube](https://i.ytimg.com/vi/wM1-SpCUZ8Y/hq720.jpg?sqp=-oaymwEhCK4FEIIDSFryq4qpAxMIARUAAAAAGAElAADIQj0AgKJD&rs=AOn4CLAayDbnIXotaC8Zvx2__JzBMBpKJg)