Header Reducers & Extensions

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: Monday 3/9/2026 if shipped by air

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

Part Number: STG-5554

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Estimated Ship Date: Mar 19, 2026 if ordered today

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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: Monday 3/9/2026 if shipped by air

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: Monday 3/9/2026 if shipped by air

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

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Estimated Ship Date: Monday 3/9/2026 if shipped by air

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: Monday 3/9/2026 if shipped by air

Header Reducer, with Oxygen Sensor Bung, 3-Bolt Flange, 2.5 in. Inlet, 2 in. Outlet, Steel, Natural, Each

Part Number: HED-21106

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HEADER COLLECTOR ADAPTER

Part Number: STW-HCA2-52O2

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Estimated Ship Date: May 8, 2026 if ordered today

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Header Collector Flanges, 3-Bolt, 2.5 in. Inlet, Steel, Natural, Gaskets, Hardware, Set

Part Number: PTE-H7254

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 30, 2026 if ordered today

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3 1/2" 3 bolt, 3 1/2" od outlet, 6" overall length. 304 S/S Construction, tig welded, 3/8" thick laser cut fl

Part Number: STW-HCA3-53-5

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Estimated Ship Date: May 8, 2026 if ordered today

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COLLECTOR FLANGE

Part Number: PTE-H7269

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Exhaust Pipe, Connector, Slip Fit, 3.00 in. I.D. to 3.00 in. O.D., Steel, Natural, Pair

Part Number: PTE-H7633

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/9/2026 if shipped by air

EXHAUST REDUCER WITH O2

Part Number: STW-TT325-O2

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Estimated Ship Date: Apr 24, 2026 if ordered today

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HEADER COLLECTOR ADAPTER

Part Number: STW-HCA3-52-5O2

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Estimated Ship Date: Monday 3/9/2026 if shipped by air

Header Reducer, Terminator Reducers/Street Hookups, 3 Bolt, Inlet 3.5 in., Outlet 2.5 in., Each

Part Number: BIG-10016FLT

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Estimated Ship Date: Mar 23, 2026 if ordered today

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LS1, LS2, LS6 Chevy w/8mm x 30mm, 1-1/4" underhead, 12 pt head, set of 12

Part Number: STG-8930B

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Estimated Ship Date: Mar 19, 2026 if ordered today

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Collector Bolts, Hex Head, Locking, Steel, Nickel Plated, 10mm x 1.5 Thread, Set of 4

Part Number: STG-8950M

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/9/2026 if shipped by air

Collector Fasteners, Locking, 3/8-16 in. Threads, 2.5 in. UHL, Set of 4

Part Number: STG-5553

Not Yet Reviewed

Estimated Ship Date: Mar 19, 2026 if ordered today

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Collector Fasteners, Locking, 3/8-16 in. Threads, 1.5 in. UHL, Set of 6

Part Number: STG-5551

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Estimated Ship Date: Mar 19, 2026 if ordered today

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Collector Bolts, Hex Head, Locking, Steel, Nickel Plated, 10mm x 1.50 Thread, 75mm UHL, Set of 6

Part Number: STG-8950F

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Estimated Ship Date: Monday 3/9/2026 if shipped by air

HEADER COLLECTOR ADAPTER

Part Number: STW-HCA32-25O2

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Estimated Ship Date: May 7, 2026 if ordered today

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

Part Number: HED-22123

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Estimated Ship Date: May 21, 2026 if ordered today

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Header Reducers, 3-Bolt Flange, 3 in. Inlet, 2.5 in. Outlet, Steel, Natural, Set of 10

Part Number: BIG-10002FLT

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Estimated Ship Date: Mar 23, 2026 if ordered today

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VERTEX FORMED EXHAUST VALVEBELLOWS

Part Number: VPX-817999

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Estimated Ship Date: Mar 30, 2026 if ordered today

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VERTEX FORMED EXHAUST VALVEBELLOWS

Part Number: VPX-817978

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Estimated Ship Date: Mar 30, 2026 if ordered today

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