I took this from their site:
997S sport exhaust system consists of:
* 1 set sport mufflers
* 1 set sport catalytic convertors with 100 cells per square inch
* 1 set OEM X51 headers
* 4 sets exhaust clamps
* 2 tube clamps to hold the catalytic convertors
* 1 set modified chromed OEM dual tailpipes (optional 1 set modified chromed Tequipment 997 Carrera oval tailpipes)
* bolts and gaskets
Power gain is 16 hp and 18 Nm / 13 Lbs ft.
Same weight as stock.
Price of the complete sport exhaust system: $ 4860.00