Flowtech Headers, Mufflers & More

Headers, Long Tube, One Piece, 1.5 in. Primary, 3.0 in. Collector, 18 Gauge Steel, 3 Bolt Collector Flange, Painted Temporary Black, Ford, 302, Pair

Part Number: BIG-12500FLT

4.0 out of 5 stars ( 18 )

Estimated Ship Date: Monday 12/1/2025

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Headers, 4-1 One-Piece, Steel, Temporary Non-High Temperature Paint, 1 1/2 in. Primary, Toyota, Each

Part Number: BIG-19000FLT

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Monday 12/1/2025

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Crossover Pipe, Long X-Pipe, Steel, Aluminized, 3 in. Diameter, Universal, Fabrication Required, Kit

Part Number: BIG-53623FLT

4.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 12/1/2025

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Headers, Shorty, Steel, Ceramic Coated, Dodge, 5.2, 5.9L, Pair

Part Number: BIG-91945-1FLT

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Dec 15, 2025 if ordered today

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Exhaust Gaskets, Header, Fiber, Stock Port, Chevy, Small Block, Kit

Part Number: BIG-99161FLT

4.65 out of 5 stars ( 26 )

Estimated Ship Date: Monday 12/1/2025

Exhaust Manifolds, Tight Tuck for LS Swaps, 1.75 in. Primaries, with Mating Flanges, Hi-Silicon-Moly Ductile Cast Iron, Black Ceramic Coating, Pair

Part Number: BIG-31730-3FLT

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/1/2025

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Alternator Bracket, Steel, Natural, Header Mount, Short Water Pump, Chevy, Small Block, Each

Part Number: BIG-10031FLT

3.94 out of 5 stars ( 18 )

Estimated Ship Date: Monday 12/1/2025

Muffler, Purple Hornie, 2 1/4 in. Inlet/2 1/4 in. Outlet, Purple Steel, Each

Part Number: BIG-50225FLT

4.87 out of 5 stars ( 15 )

Estimated Ship Date: Monday 12/1/2025

Headers, Long Tube, Steel, Painted, Pontiac, 326-455, Pair

Part Number: BIG-11170FLT

3.78 out of 5 stars ( 9 )

Estimated Ship Date: Monday 12/1/2025

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Headers, 4-1 One-Piece, Stainless Steel, Polished, 1 1/2 in. Primary, Toyota, Each

Part Number: BIG-19002FLT

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 12/1/2025

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Exhaust Gaskets, Header, P73 Ferroglass, Rectangle Port, Chrysler, Dodge, Plymouth, Small Block LA, Kit

Part Number: BIG-99361FLT

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 12/1/2025

Header Reducers, 3-Bolt Flange, 2.5 in. Inlet, 2.25 in. Outlet, Steel, Natural, Pair

Part Number: BIG-10005FLT

4.23 out of 5 stars ( 13 )

Estimated Ship Date: Monday 12/1/2025

Muffler, Warlock, 2 1/2 in. Inlet/Dual 2 1/2 in. Outlet, Steel, Gray, Each

Part Number: BIG-50552FLT

4.4 out of 5 stars ( 5 )

Estimated Ship Date: Monday 12/1/2025

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Crossover Pipe, X-Pipe, Short, Steel, Aluminized, 2.5 in. Diameter, Universal, Fabrication Required, Each

Part Number: BIG-53620FLT

4.92 out of 5 stars ( 13 )

Estimated Ship Date: Monday 12/1/2025

Headers, Shorty, Steel, Painted, Toyota, V8, Kit

Part Number: BIG-91730FLT

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 11, 2025 if ordered today

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Headers, Long Tube, Steel, Painted, Dodge, Plymouth, Cars, 273, 318, 340, 360, Pair

Part Number: BIG-13100FLT

3.67 out of 5 stars ( 9 )

Estimated Ship Date: Monday 12/1/2025

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Header Reducers, 3-Bolt Flange, 2.5 in. Inlet, 2.25 in. Outlet, O2 Bung, Steel, Natural, Pair

Part Number: BIG-10105FLT

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 12/1/2025

Headers, Shorty, Steel, Silver Ceramic Coated, 2.5 in. Collector, D-port, Ford, 5.4L, Pair

Part Number: BIG-91673-1FLT

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Dec 12, 2025 if ordered today

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Muffler, Red Hots, 2 1/2 in. Inlet/2 1/2 in. Outlet, Red Steel, Each

Part Number: BIG-50252FLT

4.61 out of 5 stars ( 36 )

Estimated Ship Date: Monday 12/1/2025

Headers, Tri-Y, Steel, Polished, 1 1/2 in. Primary Tube O.D., 2.500 in. Collector Diameter, Angle/Straight Plug, Ford, 4.3L, 4.7L, 5.0L, Pair

Part Number: BIG-12120FLT

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/1/2025

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Headers, Lakester, Steel, Silver Ceramic Coated, Round Port, Street Rod, Ford Small Block, Pair

Part Number: BIG-12703-1FLT

Not Yet Reviewed

Estimated Ship Date: Dec 12, 2025 if ordered today

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Headers, Upsweep, Stainless Steel, High-temperature Black Paint, Standard Flange, 2 1/4 in. Primary Tube O.D., Round Port, Chevrolet, Big Block, Pair

Part Number: BIG-11553FLT

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 11, 2025 if ordered today

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Exhaust Gaskets, Header, Real-Seal, Chevy, Small Block, Pair

Part Number: BIG-99150FLT

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 12/1/2025

Headers, Shorty, Stainless Steel, Natural, Ford, Pair

Part Number: BIG-12148FLT

1.86 out of 5 stars ( 7 )

Estimated Ship Date: Monday 12/1/2025

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Headers, Shorty, Stainless Steel, Polished, 1 3/4 in. Primary, Ford, Small Block Windsor, Pair

Part Number: BIG-12138FLT

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 12/1/2025

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