Summit Racing Header Reducers & Extensions

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

Part Number: SUM-626121

5.0 out of 5 stars ( 2 )

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 Reducers, 3-Bolt Flange, 3.5 in. Inlet, 3 in. Outlet, 12.000 in. Long, Stainless Steel, Polished, Pair

Part Number: SUM-626120

Not Yet Reviewed

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, 3.00 in. Diameter, 12.0 in. Length, Gaskets, Fasteners, Pair

Part Number: SUM-670162

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Header Collector Extensions, 3-Bolt, 2.50 in. Diameter, 18.0 in. Length, Gaskets, Fasteners, Pair

Part Number: SUM-670161

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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: Today

Header Reducers, 3-Bolt Flange, 3.5 in. Inlet, 2.5 in. Outlet, Stainless Steel, 12.000 in. Long, Polished, Pair

Part Number: SUM-626123

Not Yet Reviewed

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 Collector Extensions, Slip-On, 3.00 in. Diameter, 18.0 in. Length, Pair

Part Number: SUM-670167

Not Yet Reviewed

Estimated Ship Date: Today

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: Today

Header Collector Extensions, 3-Bolt, 2.50 in. Diameter, 18.0 in. Length, Gaskets, Fasteners, Pair

Part Number: SUM-670166

Not Yet Reviewed

Estimated Ship Date: Aug 21, 2025 if ordered today

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