These Flowtech upright derby style headers fit the 2.8L, 3.1L and 3.4L GM V6 engines with both round port or D-port style exhaust ports. 1-1/2 in.

and 1-5/8 in. mandrel bent primary tubes provide consistent tubing diameters for smooth flow of the exhaust pulses and increase the cylinder scavenging of the exhaust to improve engine breathing.

The headers are constructed from heavy duty 16-gauge 409 stainless steel tubing for increased strength and durability. These headers use a 10 in.

long, 2.5 in. collector with 20 in.

long primary tubes. The 3/8 in.

thick header flange provides a leak-free seal and maximizes strength.

• Mandrel bent tubes provide consistent tubing diameters for better exhaust pulse flow and improved performance 1-1/2 in. and 1-5/8 in. primary diameters available for increased exhaust flow and improved throttle response Heavy duty 16-gauge 409 Stainless Steel used for strength and durability 10 in. long, 2.5 in. collector improves exhaust flow 3/8 in. thick header flange for a leak-free seal and maximum strength Available for both round and D-port exhaust ports Header gaskets included

• CARB (California) Compliant: No
• Collector Attachment: Weld-On
• Collector Diameter: 2.50 Inch
• Collector Length: 10.00 Inch
• Collector Port Diameter: 2.50 Inch
• Color: Silver
• Design: Upright
• EGT Port: No
• Emission Code: 4
• Engine: GM 90 Degree V6
• Finish: Natural
• Flange Thickness: 0.375 Inch, 3/8
• Gasket Or Seal Included: Yes
• Grade Type: Performance
• Header Finish: Natural
• Header Style: Upright
• Inlet Port Shape: D-port
• Installed Height: 27.00 Inch
• Material: 409 Stainless Steel
• Mounting Hardware Included: No
• Oxygen Sensor Port: No
• Port Shape: D-Port
• Primary Tube Dia.: 1-1/2 inch
• Primary Tube Length: 20 inch
• Primary Tubing Diameter: 1-1/2, 1.50 Inch
• Product Type: Headers
• Sheen Level: Satin
• Tube Material: 409 Stainless Steel
• Tube Wall Thickness: 16 Gauge