This looks handy!

[ScuttleRX]

Apexi adjustable exhaust valve

This\'ll be a handy piece of kit for trackdays and the like, and like it says in write up keeping the neighbours happy, always feel a bit guilty when I take it to a night shift and return at about 5am  

[scooby_si]

yeah i looked at these b4 i got my car as was expecting neighbours to moan like they did about the scoob, in the end they didnt so i have yet to need to........Still like the idea thou
Si

[FD3SNuttah]

thats a good idea! bit pricey just to keep the neighbours happy?

[Kieron]

Think its more for the trackdays! when doing the testing make it quiet, and out on track have her on full chat  :spank

[ScuttleRX]

Yeah trackdays would be the best use, had a look on bookatrack.co.uk or something similar and they all had noise limits, not sure how id get on, some looked very low.

Since de-catted has become very noisy, which is great (especially through tunnels!) but there are also times where it is inconvienient, especially when you\'ve parked up somewhere with the turbo timer keeping it running for another couple of mins

[shaunwil]

Except of donnigton where the council has at least 3 listening posts  

Shaun

[paultakata]

Coincidentally, I just happen to have bought this from Newera, I have a sneaky suspicion that it is the very same one pictured on their site

And here\'s a pic of it installed in my (I think) Apexi N1 exhaust.

You can see the spring which keeps the valve closed at low revs, and opens gradually as the revs increase. I found it really keeps the noise down at low revs, but at high revs the noise is pretty much the same, maybe a fraction less. But, more importantly, I didn\'t notice any difference in power or response, it feels just the same as it did before.

My car\'s engine is standard though, except for the exhaust, so I don\'t know whether these effects would be valid for heavily modded cars.

[ScuttleRX]

Think yours is a different one to the one in the first link, yours is this one isnt it?

Same sort thing but with spring instead of in-car adjustable, prob a better idea as long as there is no restriction at high revs

[paultakata]

Doh! Yes, you are right, I will read posts properly before replying now :o

[Fish]

The main idea of the first one is to adjust back pressure. Normal engines require a certain amount of back pressure to work at its best, where as turbo engines like very little back pressure. But they should have some.

Fish

[jetpilot]

I like the look of those, still see it being a problem on trackdays though, if you are noisy when out there they will still keep pulling you. Handy for around town though!