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Flowtech 11705-1

Block Hugger Headers Small Block Chevy 265-400 w/ D-Port Heads

Flowtech 11705-1


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Estimated to ship directly from the manufacturer on 05/29/18
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Flowtech 11705-1 Block Hugger Headers Small Block Chevy 265-400 w/ D-Port Heads $320.95
Block Hugger Headers
  • Small Block Chevy 265-400 w/ D-Port Heads
  • 1-5/8'' Tubing
  • 2-1/2'' Collector
  • Silver Metallic Ceramic Coat

  • Flowtech 11705-1 Details


    Flowtech Headers are the perfect combination of quality and value. These block hugger headers fit the popular small block Chevy with fast burn D-port heads. This header is coated in silver ceramic coated.

  • Block hugger design fits the most popular hot rod or street rod applications with small block Chevy motors using the fast burn D-port heads
  • Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increased exhaust velocity
  • Heavy duty 16-gauge tubing for increased strength and durability
  • Smooth transition, 1-5/8'' diameter primary tubes are used for increased exhaust flow increasing performance and improving throttle response
  • Machined 2-1/2'' collector for maximum strength
  • TIG-welded, machined 3/8'' header flange for a leak-free seal and maximum strength
  • Premium aluminum header gaskets included
  • This header is coated in silver ceramic coated

  • Specifications:

    Engine Make/Size
    Chevy Small Block (262-400)
    Metallic Ceramic
    Collector Tube Size (in.)
    Tube Diameter
    Port Shape
    Tube Direction
    Down Swept
    Silver Metallic Ceramic
    Tube Size
    Manufacturer's Part Number:

    Quality, No-Leak Headers at Impressive Prices

    FlowTech Block Hugger Headers fit perfectly in street rods, even with stock-type motor mounts. Formed from mandrel-bent 16-gauge (.049" thick) steel tubing, these high-flowing headers have die-cut 5/16" flanges for reliable performance and use 3-bolt flat flange collectors. Gaskets, bolts, and reducers included for a simple-to-install custom exhaust.

  • Mandrel-Bent 16-Gauge Tubes
  • Die-Cast 5/16" Flanges
  • 3-Bolt Flat Flange Collectors
  • Engineered & Tested for Leakproof Performance
  • Installation Hardware & Gaskets Included

  • 11705-1 is rated 4.0 out of 5 by 1.
    Rated 4 out of 5 by from Install issues I was able to install the headers on my Chevy 350 but the connection to the exhaust pipe required a garage with a pipe bender and the right size flanges, which are old school and not easy to find locally but are available on line. The job finally got done with an additional expense or $190.00. Also the fit to the block was so tight that the oil pan had to be trimmed to clear the flange which was right up against the block. A better design would not have been so close to the block and the flange should have been turned 180 degrees to have the single bolt hole away from the block to allow more clearance. After a few problems and extra expense they are in and look and work well. I especially like the generous plug clearance which had been a problem with my old headers.
    Date published: 2017-11-26
    • y_2018, m_5, d_27, h_5
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    Some parts are not legal for use in California or other states with similar laws / regulations