Header Reducers & Extensions

Header Collector Extensions, 3.5 in., Slip-Fit, 18-Gauge, Fits 3.5 in. Pipe, 12 in. Length, Each

Part Number: SCH-120035

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

Header Collector Extensions, 3.0 in. Universal Flange, 2.25 in. Pipe, Pair

Part Number: HED-18805

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

Header Collector Extensions, 3-Bolt, 2.50 in. Diameter, 12.0 in. Length, Gaskets, Fasteners, Pair

Part Number: SUM-670160

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Tomorrow

Collector Bolts, Hex Head, Locking, Steel, Nickel Plated, 10mm x 1.50 Thread, 65mm UHL, Set of 6

Part Number: STG-8950N

Not Yet Reviewed

Estimated Ship Date: Tomorrow

Reducers 3 in. x 2.125 in., 3 Bolt Flange, Pair

Part Number: BIG-10007FLT

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Tomorrow

Header Reducers, Steel, Slip-On, 2 1/2 in. Primary Tube Diameter, 2.00 in. Collector Diameter, Pair

Part Number: HED-21111

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

Header Reducers, Header Buddies, Aluminumized Steel, 3-Bolt Flange, 3.0 in. Inlet, 3.0 in. Outlet, Pair

Part Number: JEX-AHB3

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

Header Collector, Ball/Socket, 2.5 in. Inlet, 2.25 in. Outlet, Steel, Zinc Plated, Composite Gaskets, Pair

Part Number: PTE-H7247

3.8 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

Header Reducers, 3-Bolt Flange, 3 in. Inlet, 2.25 in. Outlet, 409 Stainless Steel, Natural, Pair

Part Number: SUM-G4750SS

2.33 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

Header Reducer, Ball and Socket Flange, 2.5 in. Inlet, 2 in. Outlet, Steel, Painted, Each

Part Number: HED-21116

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

Header Reducer, 3-Bolt Flange, 2.5 in. Inlet, 2.25 in. Outlet, Oxygen Sensor Fitting, Steel, Each

Part Number: HED-21126

3.0 out of 5 stars ( 8 )

Estimated Ship Date: Tomorrow

Header Reducers, 3-Bolt Flange, 2.5 in. Inlet, 2 in. Outlet, Steel, Natural, Pair

Part Number: HED-21101

Not Yet Reviewed

Estimated Ship Date: Tomorrow

Collector Flange, 3-Bolt, Laser Cut, 304 Stainless Steel, 3.5 in. I.D., Each

Part Number: XFO-F3S-35

Not Yet Reviewed

Estimated Ship Date: Tomorrow

Header Reducer, 3-Bolt, 4-Bolt, Universal Flange, 3 in. Inlet, 2.25 in. Outlet, Steel, Natural, Each

Part Number: HED-21108

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

Exhaust Collector Flanges, 2-Bolt, 2.0 in. I.D., Gaskets, Fasteners, Set

Part Number: PTE-H7257

3.57 out of 5 stars ( 7 )

Estimated Ship Date: Tomorrow

HEADER COLLECTOR ADAPTER

Part Number: STW-HCA2-52-25O2

Not Yet Reviewed

Estimated Ship Date: Tomorrow

Header Collector Extensions, Slip-On, 3.50 in. Diameter, 18.0 in. Length, Pair

Part Number: SUM-670168

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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

Estimated Ship Date: Tomorrow

Header Reducers, 3-Bolt Flange, 2.50 in. Inlet, 2.00 in. Outlet, Steel, Natural, Pair

Part Number: SUM-G4755ID

3.25 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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

Part Number: HED-21110

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

Header Collector Extensions, 3.0 in., Slip-Fit, 18-Gauge, Fits 3.0 in. Pipe, 48 in. Length, Each

Part Number: SCH-480030

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

Collector Fasteners, Locking, 3/8-16 in. Threads, 3 in. UHL, Set of 4

Part Number: STG-5554

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

• Drop Ship
• Special Order

Collector Fastener, Wedge-Locking Collector Bolt, Hex Head, Steel, Black Oxide, 3/8-16 in., Set of 6

Part Number: PRO-66757

3.75 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

Header Reducer, Ball and Socket Flange, 3 in. Inlet, 2.25 in. Outlet, Steel, Painted, Each

Part Number: HED-21117

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

Collector Bolts, Split Lock, 3/8-16 in., 12-Point Head, 1.000 in. UHL, Steel, Black Oxide, Set of 6

Part Number: SUM-910130

Not Yet Reviewed

Estimated Ship Date: Tomorrow