Skunk2 Composite Fuel Rail Choose Vehicle:Ultra Race B-Series Secondary 2 and 149 mph on

2 and 149 mph on M1 with this head

you aren't just buying any run-of-the-mill engine package

If you are in a hurry

625+ material is substantially stronger than any entry level 8740 head stud material

Skunk2 Composite Fuel Rail Choose Vehicle:Ultra Race B-Series Secondary 2 and 149 mph onSkunk2s cutting edge fuel rails are available in two materials aluminum and composite. Composite fuel rails are made using a proprietary carbon impregnated, aerospace thermo polymer compositea material thats 33 percent lighter, 60 percent stronger, and operates up to 100F cooler when compared to aluminum and insulates fuel from both radiant and conductive heat transfer underneath the hood, resulting in increased horsepower and torque. Composite Fuel