Best Exhaust SOUL Porsche 981 Cayman Boxster Competition Headers Fabspeed Long Tube Headers for 987 Porsche Boxster S and Cayman S Porsche Cayman & 718 Boxster GTS GT4 4.0L 20 22 Performance Exhaust Headers Performance Headers for 19972004 Porsche Boxster 986 2.5L 2.7L 3. Headers for Porsche Boxster or Cayman, 987. 1, 2. 7L, 3. 2L, & 3. 4L motors 2005 08. All 304 stainless steel including 1. 5mm tubing and 10mm flanges. Best quality. Headers do not have catalytic converters and are designed for maximum air flow. They are designed for power gain and race track events. Features: Manufactured from 304 stainless steel and TIG welded. All tubes have 1. 5mm wall thickness 304 stainless steel and TIG welded tube. Equal length CNC mandrel bend pipe for best performance. Full 10 mm 304 stainless steel head mounting flanges Brushed Stainless Steel finish Direct bolt on installation, comes complete with gaskets. Optional O2 spacers and mini cats available to minimize CEL occurrences. Application List: Porsche Boxster 987. 1 2005 08 Porsche Cayman 987. 1 2005 08 Legality Status: Not CARB Legal. Not for sale in CA.