Sleeper Volvo 244 with truck 5.3 and Chinese turbos puts down over 600 wheel horsepower. Listen to that baby chop! 

This LS-powered ’81 VC Commodore is currently taking a break from racing, but in its heyday, this car was a drag racing beast.

Gorgeous LS-powered S14 Nissan Silvia wears a stylish purple finish and has an under-hood centrifugal surprise.

LS3 Miata features a GMPP E-Rod engine with approved cats, making it fully legal in California.

Sleeper 1999 Porsche 911 up for auction has a bit more power than it came with stock thanks to a cammed LS3 under the rear deck lid.

The entire Corvette drivetrain is stuffed underneath this Honda Civic Hatchback’s unsuspecting body. Oh, and it has a turbo, too. 

We can’t really consider the Chevy SS a sleeper. Those who know, know. Still, an LSA blower swap gets this one close to perfection.