These upright derby style headers are designed to improve exhaust flow and engine breathing on GM 2.8L, 3.1L, and 3.4L V6 engines. Mandrel-bent primary tubes maintain consistent tubing diameter to promote smooth exhaust pulse flow and enhanced cylinder scavenging. Constructed from heavy-duty 16-gauge 409 stainless steel, these headers deliver increased durability while supporting performance-driven exhaust efficiency.

Flowtech 11586FLT Features:

• Mandrel-bent primary tubes for consistent exhaust flow
• Improves exhaust scavenging and engine breathing
• Upright derby style header design
• Compatible with round and D-port exhaust ports
• Constructed from heavy-duty 16-gauge 409 stainless steel
• 1-5/8 in. primary tube diameter
• 20 in. long primary tubes
• 10 in. long 2.5 in. collector
• 3/8 in. thick header flange for strength and leak-free sealing
• Fits GM 2.8L, 3.1L, and 3.4L V6 engines

Flowtech 11586FLT Includes:

• Upright derby style headers
• Header gaskets

Flowtech 11586FLT Notes:

• Collector attachment is weld-on
• Oxygen sensor ports not included
• Mounting hardware not included
• Not CARB compliant

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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