Skunk2 02-05 Honda Civic Si/02-06 Acura RSX Composite High Volume Fuel Rails350 05 5010 Skunk2s Composite Fuel Rails are made using a proprietary carbon impregnated, aerospace thermo polymer composite a material that is 33 percent lighter, 60 percent stronger, and operates up to 100 degrees (F) cooler when compared to aluminum. The Composite Fuel Rail insulates fuel from both radiant and conductive heat transfer underneath the hood better than aluminum, resulting in increased horsepower and torque. Composite Fuel Rails also