Whenever your own Lexus RX300 stock air filter needs replacement, nothing else beats the quality and dependability of the K&N air filter. K&N can provide you the right and exact air filter for your particular vehicle. If you are looking for the exact replacement air filter for your Lexus RX300 made by K&N, the Lexus RX300 2000 - 2003 K&N air filter is the right replacement air filter for your vehicle. The recommended range on replacing you air filter is every 3 to 6 months or more frequently if you live in a dusty and dry area. Because your vehicle air filter is also one of the most important components of your vehicle, it is necessary to keep it well maintained. A filthy air filter can cause your vehicle to burn up to 20 percent more gas than if you had a clean air filter. Replacing your stock air filter with a K&N branded one can truly increase your horsepower and torque up to 4 percent. However, the amount of performance achieved precisely varies from your vehicle overall factory air intake design. The greater the restriction provided by your air filter, the greater the potential performance you can achieve. So what are waiting for? Switch now to a K&N branded air filter like the Lexus RX300 2000 - 2003 K&N air filter and get it here through our comprehensive online catalog!