The Skunk2 Composite Fuel Rail for the 2006–2011 Honda Civic Si with K20Z engines delivers enhanced thermal insulation, flow capacity, and fuel system performance. Constructed from a proprietary carbon-impregnated aerospace thermo-polymer composite, this fuel rail is 33% lighter and 60% stronger than aluminum alternatives—and operates up to 100°F cooler.

Designed to insulate fuel from engine bay heat, this composite fuel rail helps maintain consistent fuel temperatures and pressure, resulting in improved horsepower and torque. Its large 0.625-inch internal bore offers excellent pulsation dampening and optimized flow, aided by precision-machined, radius-cut injector outlets.

Compatible with all fuel types, including alcohol-based race fuels, this unit includes a specific fuel line connection kit for the 2006–2011 Civic Si, ensuring proper installation with the factory fuel system. It features -8 AN inlet/outlet ports, OEM fuel pressure regulator compatibility, and an additional 1/8" NPT port for fuel pressure monitoring.

Key Features:

• Supports up to 1,200 horsepower

• Proprietary composite is 33% lighter and 60% stronger than aluminum

• Operates up to 100°F cooler for improved thermal efficiency

• Large 0.625" internal bore for fuel flow and pulsation dampening

• Radius-cut fuel injector outlets for smoother flow

• Integrated -8 AN inlet/outlet ports

• OEM fuel pressure regulator provisions

• Additional 1/8" NPT port for pressure sensor or gauge

• Compatible with pump and race fuels, including alcohol

• Includes Civic Si-specific fuel line connection kit

Vehicle Fitment:

• 2006–2011 Honda Civic Si (K20Z)

• Universal fit for Honda K20 / K20Z applications

What's Included:

• (1) Composite Fuel Rail

• (1) Fuel Line Connection Kit (for 2006–2011 Civic Si)