Originally Posted by montgb

Who said anything about a Joe-Z throwing a CEL?? That sounds slanderous.

Originally Posted by twitte

I just took a look at the K&N website and here is what they claim:

"GUARANTEED HORSEPOWER
We will not sell an air intake that does not provide a measured increase in horsepower and torque (acceleration). Our air intakes are proven to increase horsepower and torque on a rear-wheel dynamometer (think treadmill for cars). These thoroughly engineered air intakes provide huge increases in power that a customer will definitely feel when they accelerate. See our horsepower guarantee."

Here is more on their horsepower guarantee:
http://www.knfilters.com/HPGuarantee.htm

Originally Posted by lobuxracer

Assuming the airbox is restrictive from the factory. There is no evidence to support this even after the million or so threads in this forum on intakes. There are no real world tests (dyno tests of intakes are all but worthless) showing any intake makes the car accelerate quicker. All subjective testing indicates you can change the sound of the intake with a kit.

Lexus makes NO claims the new intake does anything except legally replace the existing box for all 50 states.

Having read the million or so threads on intakes in this forum, the only conclusion that seems reasonable is get an intake if you want to hear something different.