What is this in my exhaust tip?

[OSiRiS 0]

What is this in my exhaust tip?

[darkwolf 0]

It looks like a silencer or on closer inspection a butterfly valve?

[OSiRiS 0]

It looks like a silencer or on closer inspection a butterfly valve?

Seems to me it's a butterfly valve, is this standard?

[pjay 8]

Probably, opens in the higher rev's I'd say. Like my GTZ did

[*Glenn* 855]

Seems to me it's a butterfly valve, is this standard?

Yes its standard...closes off one exhaust port to stop low speed noise. If you change the rear muffler, just put a small ball bearing in the vacuum hose to block it or else you'll end up getting an engine fault code

[OSiRiS 0]

Yes its standard...closes off one exhaust port to stop low speed noise. If you change the rear muffler, just put a small ball bearing in the vacuum hose to block it or else you'll end up getting an engine fault code

Oh ok, how can I test that it works?

[jordyboy2 0]

Yup looks like the butterfly valve found on some e46's

e46fanatics

Its used to soften down the tone of the exhaust unfer 4k revs then it opens up

irc

[*Glenn* 855]

Oh ok, how can I test that it works?

Put your roller skates on and get your girlfreind to tow you round the block

[danthaman01 0]

Put your roller skates on and get your girlfreind to tow you round the block

and post video after

[pjay 8]

Just sit behind the car and have someone open the throttle up in neutral (?)

[*Glenn* 855]

Just sit behind the car and have someone open the throttle up in neutral (?)

Car needs to be moving... controlled by DME which needs a speed sensor signal

[OSiRiS 0]

Yup looks like the butterfly valve found on some e46's

e46fanatics

Its used to soften down the tone of the exhaust unfer 4k revs then it opens up

irc

Thanks!

[OSiRiS 0]

Put your roller skates on and get your girlfreind to tow you round the block

I would do this but I don't have a towbar!

[Venatus 2]

Before I read any of the other posts, I thought that it looked like an extra exhaust tip had been welded to the back of the muffler to make it look like a twin, but the valve thingy makes more sense haha...