Do the math. The claimed improvement is virtually nonexistent.

The closest analog in that test to an Integra is the Corolla.
They claim a 2.2 percent improvement in fuel economy.
That car is rated by the EPA at 26/35 mpg.

So, if you run the numbers.. they saw:

26 x 1.022 =26.572 mpg in the city
35 x 1.022 =35.770 mpg on the highway

You can spend $100 far more wisely if you want to save gas.

Consider things like a proper alignment, inflating the tires to spec, changing the oil, replacing the oxygen sensors (if they're as old as the car) taking unneeded weight out of the car — and most importantly — reforming your driving style.

Secondly, the claimed 10 percent improvement in HP and 5 percent improvement in torque is so miniscule, it's comical. We're talking about less than 2hp and less than 1 lb-ft of torque on the Corolla's motor.

Looks like a horrid waste of money to me.