$750-$1000  

Doug Thorley Tri-Y Headers

The Tri-Y design yields maximum power from idle to 4500 RPM, while adhering to strict emissions standards. Engineered to be well-suited for Trucks, Tow-Rigs, and RV’s, power significantly increases in mid-range RPM’s, making this style exceptionally efficient at highway speeds. Fuel economy and low-end torque increase dramatically with the Tri-Y systems while reduced backpressure, lower engine heat and lessened weight are all added benefits of this design.

SeriesStyleColor/FinishMaterial
Tri-Y4:2:1 TubeSilver CeramicSteel
Header Flange (in)Primary Tube Dia.Tube GaugeCARB Comp.
0.3751.7514 GaugeYes: D-540-5
Bolts/Studs Incl.Collector Incl.Reducers Incl.Attachment
YesYesYes3 Bolt Flange
Notes
  • Must be fabricated to exhaust system
  • Fits Ford Motorhome 460
  • Kit does not include Y-pipe assembly
  • Fits V8 fuel injected engine
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Features
  • 14-gauge tubing
  • 3/8" thick flanges
  • Come beautifully ceramic coated
  • Simple bolt-on installation
  • 100% American made
  • Backed by manufacturer's lifetime warranty