How to do the Sound Generator Mod on a BMW Z4 Before & After

[@krazykeith6001]

This was standard on the 3 litre models. I retro fitted it to my 2.2, and it sounds as good as this. I kept 1/2 a sponge in, and it sounds just right to me, the perfect balance between engine, intake and exhaust noises. Love it!

[@NathanMannin]

@@krazykeith6001 I didn’t know it could be retrofitted, that’ll be very insightful for others to know! Did you cut half of the large sponge then? It is an absolutely glorious noise, seems like you have the perfect balance if you can still hear the engine note too!

[@garrycomloquoy7141]

I’ve got a 2.2 so I’ll do it. Get a back box delete. You will get the best sound ever🙏🙏🙏🙏🤘🤘🤘🤘🤘🤘🤘😎😎😎😎😎😎

[@krazykeith6001]

@@NathanManninYes, I think it was the large sponge. With both out it was far too loud.

[@rosstee]

I've just bought a 3 litre. So you mean the sound generator pipe wasn't fitted at all on other models?

[@WillemBrugman-w7k]

Wat een hoop geluk voor zo’n simpele oplossing.

[@WillemBrugman-w7k]

Gelul

[@NathanMannin]

@@WillemBrugman-w7k The second method literally only takes 2 minutes.

[@beschuitfluiter]

You can pull it from the firewall without unscrewing anything under the hood.

[@beschuitfluiter]

You can hear the vanos kick in at 4000rpm real well with this mod

[@garrycomloquoy7141]

Have you done the back box delete yet? It’s a huge difference 🤘🤘🤘🤘🙏🙏🙏🙏🙏😎😎😎😎

[@NathanMannin]

Not yet, I really like how it sounds at the moment 😆 My C63 is the one that makes all the noise!

[@malwieder_kili7231]

So I’d think on the left hand drive model the tube is on the same side as the steering wheel. Has anybody done the mod on lhd and knows how easy or difficult it is to get it done?

[@beschuitfluiter]

Yep, carefully pull the pipe from the firewall side under the hood. No tools needed.

[@brianlehmkuhl8162]

Loud = fast

[@NathanMannin]

@@brianlehmkuhl8162 exactly! 😉