Exhaust sound mod
- Thread starter benv6
- Start date
A
Anonymous
Guest
To me that sounds like someone took a drill to their Vauxhall Nova and put it straight through the box.
I think the car sounds lovely as it is!
I think the car sounds lovely as it is!
Golf Tee was very popular in the E46 330i days, basically the theory is that a vacuum line operates a butterfly valve in the exhaust. By blanking this vacuum line, the valve stays open all of the time and makes for a slightly louder experience.
There should be no negative side effects, apart from a bit more noise.. (I haven't watched the attached vid but if you Google Golf Tee mod you'll get loads of E46 posts)
There should be no negative side effects, apart from a bit more noise.. (I haven't watched the attached vid but if you Google Golf Tee mod you'll get loads of E46 posts)
I didn't realise there was still people out there with the vacuum line still attached 
It's just a flap that lowers exhaust noise. The flap opens when you get above a certain RPM threshold or a certain pedal position.
It opens sooner when the roof is down.
I've had it unplugged for the last 3 and a half years. Gives a nice low rumble to enjoy while sat in traffic.
It's just a flap that lowers exhaust noise. The flap opens when you get above a certain RPM threshold or a certain pedal position.
It opens sooner when the roof is down.
I've had it unplugged for the last 3 and a half years. Gives a nice low rumble to enjoy while sat in traffic.
I was surprised by how burbly my 35i sounded and only after coming across this mod did I check underneath and then had the explanation for what the little S shaped rubber tube was for that I found next to the battery..my car was done in tghe past and as far as I am concerned is better for it!
Keith
Keith
:wink:Your neighbours may no longer speak to you! ... :|
On my 35is one thing I find very noticeable is that before I did the mod it would start up from cold with the flap open and be really rorty and then after 2/3 seconds as the flap closed it would quieten down and sound quite tame, also being a fairly steady driver, though not quite pipe and slippers yet !! I love to hear the extra growl you get pulling a high gear at low revs. One last thing I completely disagree with Maniac on the drone at motorway speeds because even as standard the flap would be fully open at speed, but I do appreciate the 35i/35is have different exhausts which may make a difference.
On the 6 cyl models only on the 3litre turbo's, on the newer 4cyl turbo's I'm not sure, but someone will confirm
Jasper ham
Member
I tried this and did not find a lot of difference. I have now had the secondary cats removed and replaced with a straight through pipe and left the exhaust flap as it is. The car now burbles at tick over, but under heavy throttle it sounds really nice, not too loud and no drone at motorway speeds. In sport mode it accentuates the pops and bangs which is really entertaining.
