here found this on there for ya




EO: D-509 View PDF
EO Date: 2001-01-22
Manufacturer Name: Other Guys Performance Products
Device: Exhaust Header System
Device Type: Exhaust System / Exhaust Modification
Part_Number: Model_Specification: Modification_Allowed: Remarks:
340022 1998 through 2001 Grand Am 3.1L The Exhaust Header System is manufactured out of 14 gage stainless steel. Connecting pipes are included. The oxygen sensor is located at the header collector.
350023 1991 through 1999 49-state certified, General Motors 5.7L trucks Same as above
350023C 1991 through 1999 General Motors trucks 5.7L Same as above
380021 1997 through 2000 3.8L Grand Prix SE/GT/GTP, Buick Regal supercharged and non supercharged Same as above
381021 2000 Monte Carlo 3.8L Same as above
454024 1991 through 2000 49-state certified, General Motors 7.4L trucks Same as above
454024C 1991 through 2000 General Motors trucks 7.4L Same as above
498025C 2001 General Motors trucks 8.1L Same as above
580022 1999 through 2001 49-state certified, General Motors 4.8, 5.3, or 6.0L trucks Same as above
580022C 1999 through 2001 General Motors trucks 4.8, 5.3, or 6.0L Same as above