Way over priced
The device works sometimes, but not consistently. After a day or so it is nothing but irritating. It is basically a dust collector.

Not Worth It
The videos that I checked out before purchasing this product were a lot more impressive than the actual product. I have a great sound system in the vehicle I tried it out in, but had to crank the volume almost all the way up to hear it. Didn't seem to matter what frequency I had the radio tuned to either. Being a young driver in the late 60's and early 70's, I definitely know what a healthy (realistic) running V-8 sounds like, and this isn't it.

Fun toy
Keep it turned down and your friends will think it's real! I used it in my Lexus and it sounds pretty real! If you crank up the stereo you can totally tell it's fake! Still worth som laughs with your buddies and would make a fun gift to a guy that dives an econo-box.... Just tell 'em it's a performance booster!

A little flakey but loads of fun!
Yes, it's a little flimsy.
Yes, sometimes it doesn't work right.
But when it does work, it is AWESOME! And most of the time it works fine up until the point I get tired of it and turn it off.

Here is what seems to work the best for me. Wait until you start the car to plug it in (I assume you've already tuned your radio, etc.)

Slowly start rev'ing the car up to 3000 rpms. As soon as you hear a single beep, back off the revs, then you should hear 2 beeps and you're good to go.

As far as plugging your mp3 player into it, that works too, but sounds like FM. I get better sound using a cassette adapter but this works too in a pinch.

A audio item from Amazon with no audio sample ???
would be nice if Amazon had added an audio sample to their list of SoundRacer items.

No Sound - No Purchase.