F1 Renault V8.
http://video.google.ca/videoplay?docid=-7393939630149644203&q=f1
http://video.google.ca/videoplay?docid=540040517350066115&q=f1+engine
http://video.google.ca/videoplay?docid=-6306872903063870109&q=f1+engine
Orgasmic!
And your’e gay if you don’t think so.
N/A 4 rotor
also like anything inline 6, porsche rb, vq, bmw, and obviously 10 or 12’s with tubi’s
pearlS13 - didn’t forget the LS-series! Love 'em…
Altima_boy - Tubi’s indeed are gold…and consider the Supra added to my list!
Arruda - IMO the Boxster still has a pretty nice sound to it! 
Theo23 - Dude yes! I’ll be looking to see if I can upload a vid I have of a '32 Ford…absolutely ridiculous…
Sasha - CSL = yes!
Not really a huge rotary fan…but they can be alright.
Check this out… 
http://videos.streetfire.net/category/Exotics/1/2bbcd585-e7ab-42ab-b39a-98a2013ae2b5.htm
Oh my^ I love F355’s
http://videos.streetfire.net/search/Ferrari+Exhaust/0/ca23f38e-8e92-45c3-ac5e-f99463cd1053.htm
Same as above Video but with 360’s
F355 ftw in my opinion
http://videos.streetfire.net/search/355/2/wm/585724b6-2ec9-4d2c-8b46-4da480865e8b.htm
amg 5.5L, love it
Gold.
Listen to that porsche purrrr…
Takes a bit to get her fired up, but it sounds ok I guess.
Listening to the BOV, she must be running a shit load of boost and at really low rpms too.
I freaking LOVE the bad ass sound of a boxter.
Ill get our 993 C4 out to a west meet this year for demo purposes of course.
426 Hemi
A little bit of a hard time starting but then it EXPLODES with life.
civic sir motors or anything type R, they sound great hitting v -tech
dear lord. this post wins out of any of the bullshit you guys posted above
Yeah that is definitely not a motor with stock internals… ie: cams.
But I do agree… (as I stated earlier) nothing sounds like an old school mopar muscle car.
I wish my car idled like this…
http://videos.streetfire.net/search/z06+dyno/0/cdd25771-ffe9-445d-8664-dacb2ed3c957.htm
Haha that was the vid I was just looking for… 
My first S13 with the A’PEXi N1 Dual turbo back was the hottest 240 I’ve ever heard… but honestly, the nicest car I’ve ever heard on the street in person is Jantos’ Fairlady. OMG that car will make you want to sell whatever you’re driving and buy one too lol.
+1
300ZX (or Fairlady lol) with the right exhaust system is exotic-sounding…
this 300zx sounds so good omg
Unplug a coil pack