Header Reducers & Extensions

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

Part Number: HED-21115

4.65 out of 5 stars ( 43 )

Estimated Ship Date: Today

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

Part Number: SUM-G4757

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Today

Header Collector Extensions, 3.5 in., Slip-Fit, 18-Gauge, Fits 3.5 in. Pipe, 48 in. Length, Each

Part Number: SCH-480035

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Oversize $7.99

Reducer Cone Collectors, Weld-on, Stainless Steel, 3.5 in. Collector Diameter, 3.0 in. Reducer Diameter, Each

Part Number: KOK-9051S

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Header Collector Extensions, 3.0 in. Ball and Socket Style Flange, 2.50 in. Pipe, Pair

Part Number: HED-18700

4.85 out of 5 stars ( 26 )

Estimated Ship Date: Today

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

Part Number: HED-21100

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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

Part Number: HED-21118

4.5 out of 5 stars ( 10 )

Estimated Ship Date: Today

Header Collector Extensions, 3-Bolt, 3.00 in. Diameter, 18.0 in. Length, Gaskets, Fasteners, Pair

Part Number: SUM-670163

4.69 out of 5 stars ( 13 )

Estimated Ship Date: Today

Header Collector Extensions, 3-Bolt, 3.50 in. Diameter, 18.0 in. Length, Gaskets, Fasteners, Pair

Part Number: SUM-670165

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Today

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

Part Number: SUM-626101

Not Yet Reviewed

Estimated Ship Date: Today

Collector Adapter 3" inlet 3" outlet with O2 bung

Part Number: STW-HCA33-O2

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Free Shipping

Collector Bolts, Hex Head, Steel, Grade 5, 1.25 in. Long, Set of 6

Part Number: SNH-COLLBOLTSET

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Collector Rings, 3.50 in., Weld-On, 3-Bolt Flange, Steel, Natural, Pair

Part Number: SUM-G4762

4.17 out of 5 stars ( 6 )

Estimated Ship Date: Today

Collector Flange, Stainless Steel, Natural, 3 in. Diameter, Ball and Socket Flange, 16-Gauge, Each

Part Number: KOK-7106SFEMALE

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Today

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

Part Number: SNH-A-RED30

3.5 out of 5 stars ( 24 )

Estimated Ship Date: Today

Header Reducers, 3-Bolt Flange, 3 in. Inlet, 2.5 in. Outlet, 12.000 in. Long, Stainless Steel, Polished, Pair

Part Number: SUM-626122

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Header Collector Extensions, 3-Bolt, 3.50 in. Diameter, 12.0 in. Length, Gaskets, Fasteners, Pair

Part Number: SUM-670164

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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

Part Number: HOK-11032HKR

4.67 out of 5 stars ( 6 )

Estimated Ship Date: Today

Header Collector Extensions, 3.0 in. 3-Bolt Flange, 3 in. Pipe, Pair

Part Number: HED-18701

4.46 out of 5 stars ( 26 )

Estimated Ship Date: Today

Header Collector Extensions, 3.0 in. Universal Flange, 3 in. Pipe, Pair

Part Number: HED-18702

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Today

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

Part Number: SUM-G4752ID

4.66 out of 5 stars ( 38 )

Estimated Ship Date: Today

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

Part Number: SUM-G4754

4.59 out of 5 stars ( 49 )

Estimated Ship Date: Today

Collector Rings, 3.00 in., Weld-On, 3-Bolt Flange, Steel, Natural, Pair

Part Number: SUM-G4761

4.88 out of 5 stars ( 24 )

Estimated Ship Date: Today

Header Reducers, Stainless, Natural, Ball and Socket Flange, 2.5 in. Collector, 2.0 in. Reducer Outlet, Pair

Part Number: HED-22123

Not Yet Reviewed

Estimated Ship Date: Oct 20, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Header Collector Extensions, 3.0 in. 3-Bolt Flange, 2.25 in. Pipe, Pair

Part Number: HED-18803

4.6 out of 5 stars ( 10 )

Estimated Ship Date: Sep 25, 2025 if ordered today