JEGS Flash Sale
800.345.4545
Call Our Support Line
24 Hours / 7 Days a Week!  
FREE SHIPPING!
Same Day Shipping Before 11 PM ET
0
My Cart
0
$0.00
Shop By Vehicle
Shop By
Category
Close Menu
Shop By Vehicle
Top Categories
All Categories

All Categories


Free Catalog
E-Mail Signup
My Account
Track Order
Gift Certificates
Rebates
Help

Flowtech 12520

Long Tube Headers

Flowtech 12520

387-12520

jegs shipping
FREE Shipping
Ships
Easy Returns
Easy Returns
Lowest Price Guarantee
Lowest Price Guarantee
Flowtech 12520 Long Tube Headers $184.95
Long Tube Headers
  • Ford 351-400M
  • 1977-1979 F-150/F-250/F-350 4WD
  • 1978-1979 Bronco 4WD
  • 1.625'' Tube
  • 3'' Collector
  • Painted Black

  • Flowtech 12520 Details

    Ford Truck/SUV

  • Must modify stock exhaust to retain catalytic converters
  • Will only fit low-boy F-250 manufactured after 2/11/77 (build date is on driver's side door frame)

  • Specifications:

    Tube Diameter
    1.625
    Collector Tube Size (in.)
    3
    Application
    Automotive
    Tube Direction
    Down Swept
    Engine Make/Size
    Ford 351-429
    Port Shape
    Round
    Coating/Finish
    Painted
    Material
    Mild Steel
    Gaskets Included
    Yes
    Finish
    Black Paint
    Header Style
    Long Tube
    Collector Diameter (in.)
    3
    Bolts/Studs Included
    Yes
    Catalytic Converter(s) Included
    No
    Collector Attachment
    3-bolt flange
    Cross Over Pipe Included
    No
    Header Finish
    Painted
    Header Material
    Steel
    Header Style
    Full-length
    Motor Mounts Included
    No
    Primary Tube Diameter (in.)
    1 5/8
    Primary Tube Gauge
    18-gauge
    Quantity
    Sold as a pair
    Reducers Included
    Yes
    Transmission Mount Included
    No
    Tuned
    No
    Weld-Up
    No
    Flange Style
    Standard
    Manufacturer's Part Number:
    12520FLT

    Performance Plus Fuel Economy at a Price You Can Afford!

    These headers are made of 16-gauge tubing that's welded to O-ring port exhaust flanges on one end and mandrel-formed collectors on the other. You get a premium performance-minded design with a budget-minded attitude!




    Features
  • 16-gauge (.049" thick) cold-rolled mild steel (except stainless steel were noted)
  • Precision engineered for performance, fuel economy, and fit
  • Mandrel-formed plenum increases flow for more power
  • Leakproof O-ring port seals quality tested by FlowTech
  • Finished with black paint or ceramic coating, polished available for some applications

  • Does Flowtech 12520 fit your vehicle?

    Narrow Results
    Filter By
    Year
    Filter By
    Model
    Filter By
    SubModel
    Filter By
    EngineType
    Filter By
    Liter
    Filter By
    Aspiration

    1978-1979 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 5.8
    • Aspiration: N
    • SubModel: RANGER LARIAT
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1979 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1978 FORD BRONCO

    • Liter: 6.6
    • SubModel: NORTHLAND
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979 FORD F-350

    • Liter: 6.6
    • SubModel: RANGER LARIAT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1979 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 5.8
    • Aspiration: N
    • SubModel: RANGER XLT
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1979 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 5.8
    • Aspiration: N
    • SubModel: RANGER
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1978 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 5.8
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1978-1979 FORD BRONCO

    • Liter: 5.8
    • Aspiration: N
    • SubModel: CUSTOM
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1979 FORD F-150

    • Liter: 6.6
    • SubModel: RANGER LARIAT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1979 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 6.6
    • SubModel: RANGER XLT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979 FORD F-350

    • Liter: 6.6
    • SubModel: RANGER
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1979 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 6.6
    • SubModel: RANGER
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1979 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 5.8
    • Aspiration: N
    • SubModel: CUSTOM
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1978 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 6.6
    • SubModel: NORTHLAND
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979 FORD F-350

    • Liter: 5.8
    • Aspiration: N
    • SubModel: RANGER
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1978-1979 FORD BRONCO

    • Liter: 6.6
    • SubModel: RANGER XLT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979 FORD F-150

    • Liter: 6.6
    • SubModel: RANGER XLT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979 FORD F-150

    • Liter: 5.8
    • Aspiration: N
    • SubModel: RANGER LARIAT
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1978 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979 FORD F-150

    • Liter: 5.8
    • Aspiration: N
    • SubModel: CUSTOM
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1978 FORD BRONCO

    • Liter: 5.8
    • Aspiration: N
    • SubModel: NORTHLAND
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1979 FORD F-350

    • Liter: 6.6
    • SubModel: RANGER XLT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979 FORD F-350

    • Liter: 5.8
    • Aspiration: N
    • SubModel: RANGER XLT
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1978-1979 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 6.6
    • SubModel: RANGER LARIAT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1978 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 5.8
    • Aspiration: N
    • SubModel: NORTHLAND
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1979 FORD F-150

    • Liter: 6.6
    • SubModel: RANGER
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979 FORD F-350

    • Liter: 5.8
    • Aspiration: N
    • SubModel: CUSTOM
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1979 FORD F-150

    • Liter: 5.8
    • Aspiration: N
    • SubModel: RANGER
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1979 FORD F-350

    • Liter: 5.8
    • Aspiration: N
    • SubModel: RANGER LARIAT
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1978-1979 FORD BRONCO

    • Liter: 5.8
    • Aspiration: N
    • SubModel: RANGER XLT
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1979 FORD F-150

    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 5.8
    • Aspiration: N
    • SubModel: XLT
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1978-1979 FORD BRONCO

    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979 FORD F-350

    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977 FORD F-250

    • Fitment_Note: Will Fit Low Boy Manufactured After 2/1/1977 Only (Located On Door Frame)
    • Liter: 6.6
    • SubModel: XLT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979 FORD F-150

    • Liter: 5.8
    • Aspiration: N
    • SubModel: RANGER XLT
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )
    12520 - FlowTech Headers is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from Made a Big Difference Made a big difference. Had to modify one tube on the passenger side to clear the frame. Woke the engine up.
    Date published: 2017-05-08
    • y_2017, m_10, d_21, h_22
    • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_1
    • loc_en_US, sid_10001_10001_188216, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs
    Items You Need

    Before you leave us... Receive a free catalog or join our email list

    Sign up to receive our catalog or subscribe to our email list now to see our exclusive email only specials, new products, and offers!

    Request CatalogJoin Email List