The Fabspeed Porsche 986 Boxster Maxflo Performance Exhaust System (1997-2004) features: 
 
Dramatically improve sports car sound and throttle response with upgraded Maxflo mufflers and inlet tubing. Includes Deluxe Bolt-On Dual Style Tips in your choice of finish to compliment your vehicles look and style.                                                            
FEATURES:
Fits all Porsche 986 Boxster / S vehicles (1997-2004) (Please see notes below for EU and rest of world car fitment)
Includes Deluxe Dual Style Tips in your choice of finish
Improves power by 8 whp and 8 ft-lbs of torque
Saves 30 lbs from the rear of the vehicle compared to the full OEM exhaust system
Does not trigger check engine light
Constructed from high quality 14-16ga CNC mandrel-bent T304 stainless steel for maximum performance and durability
Noticeable improvement in sports car sound and throttle response
Direct replacement for the OEM muffler with no cutting or welding required
All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty
NOTE:
1997-1999 and 1997-2004 EU and R.O.W. Boxster Maxflo STREET exhaust system includes HJS sport catalytic converters to remain emission compliant with no CEL's
2000-2004 US cars have two sets of catalytic converters, Our 2000-2004 system deletes the redundant secondary catalytic converters. This will NOT cause a CEL.
1997-1999 986 Boxster Maxflo RACE Performance Exhaust catbypass pipes with O2 bungs in the factory position, and is recommended for Off-Road Track Use Only