It might not be as pretty as our powdercoated intakes but for a lot less money you can make your own intake with this Neoprene impregnated tubing.  Tubing is available in 4" diameter segments and has a smooth inner wall for optimal airflow.  

• Neoprene impregnated cotton tubing
• Resistant to temperatures up to 250 degrees F
• Inexpensive alternative to pre-manufactured intakes
• Add a filter and go!

Tubing is sold by the foot.  For 10 feet simply change the cart quantity to 10.