Flowtech Headers

4.08 out of 5 stars 997 Customer Reviews

Flowtech headers are designed to provide optimum exhaust flow for increased horsepower, torque, fuel economy, and improved throttle response. Leak-tested for maximu

Flowtech headers are designed to provide optimum exhaust flow for increased horsepower, torque, fuel economy, and improved throttle response. Leak-tested for maximum performance, they feature the industry's best welds for durability and are carefully engineered for precise fit. Available for a wide range of applications, they're offered in block hugger, competition, fenderwell, lakester, long tube, mid-length, shorty, upright, and turbo styles. Varying with the application, Flowtech headers are constructed from sturdy and lightweight cold-rolled mild steel or stainless steel for increased strength and durability. All tubing is mandrel-bent to provide consistent tubing diameter for smooth flow and increased exhaust velocity. Extra-thick, machined header flanges provide a leak-free seal and maximum strength. For long-term rust and corrosion-resistance, available finishes include natural and polished stainless steel, high heat-resistant black paint, or a satin silver metallic ceramic thermal barrier coating. All mounting hardware and premium gaskets are included.

Important notes: Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat. Hooker recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating damage. Flowtech does not recommend the use of header wraps as this will void the warranty.

Showing In Stock Items. Show All 14 Items.

Results 1 - 13 of 13

Flowtech Headers 11575FLT

Headers, Shorty, Stainless Steel, Natural, 3-Bolt Flange, Chevy, Small Block, LS Engine, Pair

Part Number: BIG-11575FLT

3.0 out of 5 stars ( 9 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Flowtech Headers 11569FLT

Headers, Turbo, Up and Forward, 304 Stainless Steel, Natural, 1.750 in. Primary, 2.50 in. V-Band Collector, Chevrolet, Small Block Gen I, Pair

Part Number: BIG-11569FLT

3.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Flowtech Headers 11576FLT

Headers, Shorty, Stainless Steel, Polished, 1 5/8 in. Primary, Chevy, Small Block, LS, Pair

Part Number: BIG-11576FLT

3.88 out of 5 stars ( 8 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Flowtech Headers 11573FLT

Headers, Turbo, Up and Forward, 304 Stainless Steel, Polished, 1.875 in. Primary, 2.500 in. V-Band Collector, Chevrolet, Small Block Gen I, Pair

Part Number: BIG-11573FLT

Not Yet Reviewed

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Flowtech Headers 11579FLT

Headers, Shorty, 304 Stainless Steel, Polished, 1 5/8 in. Primary, 3/8 in. Flange, Chevy, LS Swap, Pair

Part Number: BIG-11579FLT

2.75 out of 5 stars ( 4 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Flowtech Headers 11578FLT

Headers, Shorty, Stainless Steel, Natural, 1 5/8 in. Primary, Chevy, GMC, Small Block, Pair

Part Number: BIG-11578FLT

2.75 out of 5 stars ( 4 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Flowtech Headers 11586FLT

Headers, Upright, 1 5/8 in. Primary, 2.5 in. Collector, Stainless Steel, Natural, GM, 2.8L, 3.1L, 3.4L, Pair

Part Number: BIG-11586FLT

Not Yet Reviewed

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Flowtech Headers 91843FLT

Headers, Shorty, Steel, Painted, Chevy, GMC, Pickup, 4.8, 5.3L, Pair

Part Number: BIG-91843FLT

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Flowtech Headers 91843-1FLT

Headers, Shorty, Steel, Ceramic Coated, Chevy, GMC, Pickup, 4.8, 5.3L, Pair

Part Number: BIG-91843-1FLT

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Flowtech Headers 11570FLT

Headers, Turbo, Up and Forward, 304 Stainless Steel, Polished, 1.750 in. Primary, 2.50 in. V-Band Collector, Chevrolet, Small Block Gen I, Pair

Part Number: BIG-11570FLT

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Flowtech Headers 11585FLT

Headers, Upright, 1 1/2 in. Primary, 2.5 in. Collector, Stainless Steel, Natural, GM, 2.8L, 3.1L, 3.4L, Pair

Part Number: BIG-11585FLT

Not Yet Reviewed

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Flowtech Headers 92003FLT

Headers, Shorty, Steel, Temporary Black Paint, Jeep, Each

Part Number: BIG-92003FLT

Not Yet Reviewed

Estimated Ship Date: Feb 20, 2026 if ordered today

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Estimated Ship Date: Feb 20, 2026 if ordered today

Flowtech Headers 11587FLT

Headers, Upright, 1 1/2 in. Primary, 2.5 in. Collector, D-Port, Stainless Steel, Natural, GM, 2.8L, 3.1L, 3.4L, Pair

Part Number: BIG-11587FLT

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

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