Installed a set of Dansk double bubble tips ( similar to TechArt style ) on the Turbo . The smaller tip is just a dummy as the exhaust pipe connects to the larger tip only. But... there is a crescent shaped cut out between the two tips ( like a horn instrument) so when the boost comes in AND heavy or rapid throttle is applied , the exhaust gas velocity gets fast enough to produce a loud ( esp with windows down ) continuous multi-harmonic rising frequency shreik . Combined with the lower roar of the exhaust , it sounds like a commercial jetliner at takeoff all the way to redline .

You can also reverse L/R tips and instead of protruding straight out, they are angled up like on some Lamborghhini V12s .


Totally controlled by the throttle foot - only heard when you get on it. It's nuts!

 

They call those "Whistle Tips" in Oakland.

 

Didn't those whistle all the time , leading to tickets ?
Mine only "shreik" at near wide open throttle - more like a complex harmonic of the exhaust system. !
I don't think these would do the same installed on a normally aspirated C4S- probably not enough flow velocity.

 

sounds like bubb rubb:

http://media.ebaumsworld.com/bubbrubb.wmv

 

the Folgers coffee can exhausts and cherry bombs were not enough, now it has gone to a new level of gheyness!! I think I will drop this on my car, with some 12 inch wire Daytons w/ spinners and curb feelers... gotta make sure to get the spacers too so my rims stick out about a foot from the fenders. Maybe some chrome mudflaps tilted at a 45 deg. angle with a naked chick embossed on them, and a mural of a naked chick on my hood too!

 

MKW, any pics?

 

If you want, I have pics , even ones with them angled upwards for fun. If any one wants to see those , I'll post them tonight.