Header Reducers

Your headers end in one size, and the rest of your exhaust is a different size. Looks like you need some header reducers!

Since lap joints are easier to deal with than...

Your headers end in one size, and the rest of your exhaust is a different size. Looks like you need some header reducers!

Since lap joints are easier to deal with than butt joints, it's ideal to have the outside diameter of the pipe coming off the collectors fit within the inside diameter of the exhaust pipe. Header reducers (sometimes called collector reducers) usually have a flange on one end, to connect to the header, and the other end is made to slip fit into your exhaust system. From there, it's a simple matter to clamp the joint together, or simply weld it.

Summit Racing Equipment makes it easy to find the reducer you...

Your headers end in one size, and the rest of your exhaust is a different size. Looks like you need some header reducers!

Summit Racing Equipment makes it easy to find the reducer you need. You can filter the results below by collector diameter, outlet diameter, and even material and finish! If you need an exhaust sensor bung, you can filter those out, too.

If you need to change pipe sizes further downstream, Summit also carries exhaust pipe adapters and reducers to help you assemble the perfect custom system. For more information and advice on exhaust component sizing, check out this article and video on our blog.

Top Brands

Never settle for parts from third-party resellers! You can shop with confidence at Summit Racing Equipment, because we only partner with trusted manufacturers. Choose your header reducers from proven brands like Hedman Hedders, Dynomax Performance, Hooker Headers, Flowmaster, Kooks Headers, Patriot Exhaust, Sanderson Headers, JBA Headers, Pypes Performance, and many more.

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Results 1 - 25 of 66

Schumacher Creative Services Big Block Tri-Y Header Collector Adapters with 2.5 Inch Outlet HCA

Header Reducers, 2-Bolt Flange, 2.50 in. Inlet, 2.50 in. Outlet, 6 in. Length, Steel, Natural, Pair

Part Number: SC2-HCA

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JBA Performance Exhaust Header Reducers with 2.5 Inch Outlet 1650ST

Header Starter Tubes, Ball and Socket, 2-Bolt Flange, 409 Stainless Steel, 2.5 in. Diameter, Pair

Part Number: JBA-1650ST

5.0 out of 5 stars ( 13 )

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JBA Performance Exhaust Header Reducers with 2.5 Inch Outlet 1650-1ST

Header Starter Tubes, Ball and Socket, 2-Bolt Flange, 409 Stainless Steel, 2.5 in. Diameter, O2 Bungs, Pair

Part Number: JBA-1650-1ST

4.6 out of 5 stars ( 5 )

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Stainless Works Reducers with 3 Inch Outlet HCA33

Stainless Works Reducers with 3 Inch Outlet HCA33

Header Collector Adapter, Reducer, 3.0 in. 3-Bolt Flange, 3.0 in.Out., 6.0 in. OAL., 304L SS, Each

Part Number: STW-HCA33

5.0 out of 5 stars ( 1 )

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JBA Performance Exhaust Header Reducers with 2.5 Inch Outlet 31650-1ST

Header Starter Tubes, Ball and Socket, 2-Bolt Flange, 304 Stainless Steel, 2.5 in. Diameter, O2 Bungs, Pair

Part Number: JBA-31650-1ST

Not Yet Reviewed

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Stainless Works Reducers with 2.5 Inch Outlet HCA3.52.5

Header Collector Adapter, Reducer, 3.5 in. 3-Bolt Flange, 2.5 in.Out., 6.0 in. OAL., 304L SS, Each

Part Number: STW-HCA3-52-5

Not Yet Reviewed

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JBA Performance Exhaust Header Reducers with 2.5 Inch Outlet 31650ST

Header Starter Tubes, Ball and Socket, 2-Bolt Flange, 304 Stainless Steel, 2.5 in. Diameter, Pair

Part Number: JBA-31650ST

5.0 out of 5 stars ( 2 )

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Hedman Header Reducers with 3 Inch Outlet 21119

Header Reducers, Ball and Socket Flange, 3 in. Inlet, 3 in. Outlet, Steel, Natural, Pair

Part Number: HED-21119

4.9 out of 5 stars ( 29 )

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JBA Performance Exhaust Header Reducers with 2.5 Inch Outlet 1653ST

Header Starter Tubes, Ball/Socket, 2-Bolt Flange, 409 Stainless Steel, 2.5 in. Diameter, with JBA-1653, Pair

Part Number: JBA-1653ST

4.5 out of 5 stars ( 2 )

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Hedman Header Reducers with 2.5 Inch Outlet 21115

Header Reducers, Ball and Socket Flange, 3 in. Inlet, 2.5 in. Outlet, Steel, Painted, Pair

Part Number: HED-21115

4.67 out of 5 stars ( 45 )

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Hedman Header Reducers with 3 Inch Outlet 21152

Header Reducers, 3.000 in. Diameter, Ball and Socket Flange, Steel, Natural, Kit

Part Number: HED-21152

4.56 out of 5 stars ( 9 )

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Hooker Reducers with 2.5 Inch Outlet 11040HKR

Header Reducers, 3-Bolt Flange, 3.00 in. Inlet, 2.50 in. Outlet, Steel, Painted, Pair

Part Number: HOK-11040HKR

4.78 out of 5 stars ( 50 )

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Hedman Header Reducers with 2.5 Inch Outlet 21123

Header Reducers, Ball and Socket Flange, 2.5 in. Inlet, 2.5 in. Outlet, Steel, Natural, Pair

Part Number: HED-21123

4.83 out of 5 stars ( 18 )

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Hedman Oxygen Sensor Reducers with 2.5 Inch Outlet 21143

Oxygen Sensor Reducer; Tube Size 2.5 in.; Collector Size 3 in.; w/Ball And Socket Flanges; Mild Steel

Part Number: HED-21143

4.56 out of 5 stars ( 9 )

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Stainless Works Reducers with 3 Inch Outlet HCA33O2

Collector Adapter 3" inlet 3" outlet with O2 bung

Part Number: STW-HCA33-O2

5.0 out of 5 stars ( 1 )

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Hedman Header Reducers with 3 Inch Outlet 22119

Header Reducers, Stainless, Natural, Ball and Socket Flange, 3.0 in. Collector, 3.0 in. Reducer Outlet, Pair

Part Number: HED-22119

5.0 out of 5 stars ( 2 )

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Sanderson Headers Header Reducers with 2.5 Inch Outlet A-RED3.0

Header Reducers, 3-bolt Flange, Steel, Painted, 3 in. To 2.5 in., Pair

Part Number: SNH-A-RED30

3.56 out of 5 stars ( 25 )

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Hedman Header Reducers with 3 Inch Outlet 21118

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

Part Number: HED-21118

4.55 out of 5 stars ( 11 )

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Hedman Header Reducers with 2.5 Inch Outlet 22115

Header Reducers, Stainless, Natural, Ball and Socket Flange, 3.0 in. Collector, 2.5 in. Reducer Outlet, Pair

Part Number: HED-22115

4.5 out of 5 stars ( 4 )

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Hedman Oxygen Sensor Reducers with 3 Inch Outlet 21133

Header Reducer, with Oxygen Sensor Bung, 3-Bolt Flange, 3 in. Inlet, 3 in. Outlet, Steel, Painted, Each

Part Number: HED-21133

4.67 out of 5 stars ( 15 )

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Hedman Header Reducers with 2.5 Inch Outlet 21105

Header Reducer; Gasket Style; Tube Size 2.5 in.; Collector 2.5 in.; 3-Bolt Flange; Mild Steel

Part Number: HED-21105

4.57 out of 5 stars ( 23 )

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Sanderson Headers Header Reducers with 2.25 Inch Outlet A-RED2.5

Header Reducers, 2.5 in. To 2.25 in., Angled Approximately 30 Degrees, 3-Bolt Flange, Steel Construction, Painted Finish, Pair

Part Number: SNH-A-RED25

4.08 out of 5 stars ( 12 )

Estimated Ship Date: Tomorrow

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Hooker Reducers with 2.5 Inch Outlet 11035HKR

Header Reducers, 3-Bolt Flange, 3.50 in. Inlet, 2.50 in. Outlet, Steel, Painted, Pair

Part Number: HOK-11035HKR

4.75 out of 5 stars ( 8 )

Estimated Ship Date: Tomorrow

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Hedman Header Reducers with 2.25 Inch Outlet 21114

Header Reducers, Ball and Socket Flange, 3 in. Inlet, 2.25 in. Outlet, Steel, Painted, Pair

Part Number: HED-21114

4.73 out of 5 stars ( 11 )

Estimated Ship Date: Tomorrow

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Hedman Header Reducers with 2.5 Inch Outlet 21151

Header Reducers, 2.500 in. Diameter, Ball and Socket Flange, Steel, Natural, Each

Part Number: HED-21151

4.71 out of 5 stars ( 14 )

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