Engine Kits

Flowtech 12118FLT Standard Finish Headers
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Flowtech 12118FLT Standard Finish Headers

Part #: 12118FLT
List Price: $360.34
Our Price: $168.95
You Save: $191.39

1970- 1974 Ford Mustang 351c 4V FlowTech Headers are precision engineered and leak tested to get maximum performance and fuel economy from your engine.

Each FlowTech header is formed from specially selected .049 cold roll flash controlled tubing, and features
FLOWTECH's exclusive, thick, mandrel–formed Power Plenum collector. All ports are precisely fitted and finished with sturdy, leak–proof O–ringed port seals, and all FlowTech Headers include all mounting hardware including bolts, nuts and premium gaskets.

70–74 Mustang/Cougar/Fairlane,  70-73 Will Not Fit C6 Transmission
70–73 Torino/Ranchero/Cyclone/Montego: 351C–4V, Will Not Fit C6 Transmission

Tube Size 1.75",
Collector Size 3",
Black High Temp Paint

Installation Notes
Breaking in an engine with ceramic coated Headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated Headers require several heat cycles to fully cure before they will withstand extreme heat. FlowTech recommends using cast iron exhaust Manifolds or old Headers to break in new engines to avoid coating damage.

Technical Information


  • Fuel Economy From The Engine
  • Leak Test For Max Performance
  • Mandrel-Formed Power Plenum
  • Leakproof O-Ringed Port Seals
  • Include All Mounting Hardware
  • Constructed of .049 cold roll flash mild steel tubing
  • Precision engineered for fit, performance and economy
Bolts/Studs Included Yes
Brand Flowtech
Collector Attachment 3-bolt flange
Collector Diameter 3.000 in.
Flange Style Standard
Flange Thickness (in) 5/16 in.
Gaskets Included Yes
Header Finish Painted
Header Material Steel
Header Style Full-length
Motor Mounts Included No
Part Type Headers
Primary Tube Diameter (in) 1 3/4 in.
Primary Tube Gauge 18-gauge
Product Line FlowTech Headers
Quantity Sold as a pair.
Reducers Included Yes
Transmission Mount Included No
Tuned No
Y-Pipe Included No