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Flowtech 11546FLT SBC Upright Derby Headers, 1-3/4 Inch
Flowtech 11546FLT SBC Upright Derby Headers, 1-3/4 Inch

Flowtech 11546FLT SBC Upright Derby Headers, 1-3/4 Inch

Chevy Small Block V8, Stainless Steel, 3 Inch Collector Diameter

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Flowtech 11546FLT SBC Upright Derby Headers, 1-3/4 Inch
Flowtech 11546FLT SBC Upright Derby Headers, 1-3/4 Inch
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Part # 42511546FLT
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  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.


Material Type:
Stainless Steel
MFG. Part #:
Collector Diameter:
3 Inch
Collector Length:
Sold in Quantity:
Emission Code:
GTIN Code:


Get the perfect combination of quality and value with FlowTech Upright Derby or Truck Pull Style Headers. Features a 1-3/4” tubing diameters and are ideal for even big cubic inch Small Block Chevy engines.
Also features a merged collector coupled with a collector spear that is welded inside the collector. These components help to improve the flow and performance of the header.


  • CNC Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increases the cylinder scavenging effect and improves engine breathing
  • Heavy duty 16-gauge 409SS tubing for increased strength and durability
  • 1-3/4” tubing diameters available for increased exhaust flow increasing performance and improved throttle response
  • 3” collector for maximum strength and exhaust flow
  • Extra thick header flange for a leak-free seal and maximum strength
  • Welded-in collector merge spears to control exhaust gas re-entry into primary tubes
Some parts are not legal for use in California or other states with similar laws/regulations

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