Increase the boost on your 2003 Cobra - for more power. These Steeda Supercharger Pulleys are made from Steel not aluminum and have holes drilled around the center of the pulley to lower the rotational weight. This is the highest quality pulley available for the 2003 Cobra.

Part# 146-15910
2003 Cobra Pulley 3.10" pulley
1-2psi over stock
Requires Dialosport Chip.
Testing has shown 25+ horsepower.
3.10inch 11-12 PSI
Price $79.95

Part#: 146-15900
2003 Cobra Pulley 2.81" pulley
4-5psi over stock
Requires Diablosport Chip and shorter serpentine belt.
Testing has shown gains of 60+ horsepower!!
2.81inch 13-14 PSI
Price $79.95