Part Number: GP115 1999-2001 Chevrolet Silverado 1500 Gibson Headers Chrome Plated 1999-2001: Base; 8Cyl 4.8L; 1999-2001: Base; 8Cyl 5.3L; 1999-2001: LS; 8Cyl 4.8L; 1999-2001: LS; 8Cyl 5.3L; 1999-2001: LT; 8Cyl 4.8L; 1999-2001: LT; 8Cyl 5.3L; $488.91 Gibson Headers Part Number: GP115S 1999-2001 Chevrolet Silverado 1500 Gibson Headers Stainless Steel 1999-2001: Base; 8Cyl 4.8L; 1999-2001: Base; 8Cyl 5.3L; 1999-2001: LS; 8Cyl 4.8L; 1999-2001: LS; 8Cyl 5.3L; 1999-2001: LT; 8Cyl 4.8L; 1999-2001: LT; 8Cyl 5.3L; $574.69 Gibson Headers Part Number: GP116 1999-2001 Chevrolet Silverado 1500 Gibson Headers Chrome Plated 1999-2001: Base; 8Cyl 4.8L; 1999-2001: Base; 8Cyl 5.3L; 1999-2001: LS; 8Cyl 4.8L; 1999-2001: LS; 8Cyl 5.3L; 1999-2001: LT; 8Cyl 4.8L; 1999-2001: LT; 8Cyl 5.3L; $488.91 Gibson Headers Part Number: GP116S 1999-2001 Chevrolet Silverado 1500 Gibson Headers Stainless Steel 1999-2001: Base; 8Cyl 4.8L; 1999-2001: Base; 8Cyl 5.3L; 1999-2001: LS; 8Cyl 4.8L; 1999-2001: LS; 8Cyl 5.3L; 1999-2001: LT; 8Cyl 4.8L; 1999-2001: LT; 8Cyl 5.3L; $574.69 Gibson Headers Part Number: GP129 2002-2009 Chevrolet Silverado 1500 Gibson Headers Chrome Plated 2002-2005: Base; 8Cyl 4.8L; 2002-2005: Base; 8Cyl 5.3L; 2002-2006: LS; 8Cyl 5.3L; 2002-2009: LS; 8Cyl 4.8L; 2002-2009: LT; 8Cyl 4.8L; 2002-2009: LT; 8Cyl 5.3L; 200 $488.91 Gibson Headers Part Number: GP500 2003-2006 Chevrolet Silverado 1500 Gibson Headers Chrome Plated 2003-2006: SS; 8Cyl 6.0L; $488.91 Gibson Headers Part Number: GP500 2006 Chevrolet Silverado 1500 Gibson Headers Chrome Plated 2006-2006: LT; 8Cyl 6.0L; $488.91 Gibson Headers Part Number: GP500S 2003-2006 Chevrolet Silverado 1500 Gibson Headers Stainless Steel 2003-2006: SS; 8Cyl 6.0L; 2006-2006: LT; 8Cyl 6.0L; $574.69 Gibson Headers