Chrome. Streamlined curves; that never seem to end; looks that demand a second glance. Like all Vance & Hines pipes the Big Radius comes with full coverage 2 1/2" diameter plasma cut heat shields that preserve the ''new'' look and will virtually eliminate visible blueing. Power; torque and the signature Hot-Rod sound are all included. Baffles are removable. Note: Comes with 18mm O2 threads. A 18mm sensor-hole plug set; like 981623; is not included and must be ordered separately when O2 sensors are not used. A 18 to 12mm O2 sensor reduction bung set must be ordered separately when required. Note: See 981797 for replacement baffle. Note: See 558779 for optional quiet baffle.