i think this is one of the best NA sound, if you got better one, please show us a clip :) http://www.youtube.com/watch?v=y_aWX3EteWI&search=s2000

google Mazda 787b :)

It's pretty good, there's not enough depth to it for my liking. It needs some lower frequency in there. A couple of my favourites are the M3 CSL, Zonda, and M5. I'm a fan of engines with a little rasp in the lower rpms but that scream up top.

im a fan of boxer engines...porsche ftw. (subarus good too)

f1 car?

im a fan of boxer engines...porsche ftw. (subarus good too)

I love the sound of the 911. Feather the gas and it purrs like a cat, step on it and it roars like a lion.

Um, definately F1! Even the Porsche Carrera GT sounds fantastic

Ferrari F355 is my favorite engine note.

http://videos.streetfire.net/search/f355/0/CBE69125-A54B-48EB-9950-20E43FFECC59.htm

For a car I could probably afford, I love the sound of the VW R32.
http://sites.vwsport.com/PhillyR32/Philly%20Video.wmv

26B... or a 13B-RE with bridge port... brap brap brap brap... awhh sex...

LS1, LS2, and LS7 would be my vote.

I happen to love that vtec sound as well.

Hes pwning in the da twisties! anyway yeah that damn s2000 sounds beautiful ;d. My note of choice is def the porsches also.... pure sex :D

Holy crap that s2000 driver was great.

Im gonna agree on the 787. That car sounds amazing in the fly by. 4 rotors = sex
Streetcar wise, I honestly do love the sound of my rx8. Not just saying that because of this forum. No other car sounds like it and when you hit those higher rpm's, its sweet chin music.

i still think an f1 car... even if it might be an arrow...
http://video.google.com/videoplay?docid=6195882546314478419&q=f1+engine

Prius sounds good

N/A race cars:
F1
Indy
Z-06 Gt class
Porsche Gt ,GT2, class
Caddilac CTS-R (Beastly....freaking hot!) Gt class
RX-8 Team Mazdaspeed Class?????
Panos LMP1 class
Ferrari(any) GT1 class, Gt2 class
350Z Nismo JGTC
Mazda 787B
...few others...... :)

N/A Street legal
Z-06,C5 and C6....C6 Z-06 sounds like a race car at WOT
All Ferrari's
S2000
Porsche 911 turbos, sounds jet like
Mustang SVT
Zonda
Aston Martin
Mercedes E55...sounds jet like from inside the car
Rx-8
NissanTTZ
Acura NSX, NSX-R
Acura ITR
BMW M3/M5
Viper ...Brutal sound,not the pretiest

and a few others

Best I have heard in person- Ferrari F430.

Hmmm- F430- http://youtube.com/watch?v=4ZK9G1uKUno

mmmm 550 w/ tubi and x-pipe- http://youtube.com/watch?v=6Uupb9UuPXI

I love the sound of an F1 engine. The V10's sound a little different from the new V8's but they both still sound incredible. The 4 rotor is definitely an awesome sound like no other. I also like many of Ferrari's engines. Flat plane crank engines sound so nice.

S2000, 350Z under 40K.

Ferrari 360CS (Challenge Stradale) gets my vote... I got to hear one of these fire up and back out of a completely enclosed ferrari dealership (other than the bay it went through). SOUNDS AMAZING!!!

http://www.youtube.com/watch?v=NyX-ukOcMio&search=Ferrari%20Challenge%20Stradale

There's a clip of the new F430 Challenge on youtube.com too, Vicki from 5th Gear drives it and its swet.