flame throwin exhaust.

Google this:

flame thrower exhaust

More hits than you know what to do with. You can get kits off eBay, Summit, etc. If you have the parts on hand, you can wire them up like this:

http://www.oznium.com/forum/topic3313

Don't need no stinkin' kit!

'Ol boy had a 54 MERC 256 with the exhaust crossover on the front of the engine. Would take that pipe off and run it across the gas station lot at night.

Looked like a TOP FUEL lighting up...