Account Login
Gift Cards
Track Order
Help Center

Flowtech Long Tube Headers


Product Q&A
View Now
Click image to zoom
Long Tube Headers
More than 10 available
Long Tube Headers
  • Chevy 283-400
  • 1966-87 Chevy/GMC 1/2, 3/4 & 1-Ton 2WD/4WD
  • 1966-91 Blazer/Jimmy K5, Suburban 4WD
  • 1967-87 Chevy Blazer & GMC Jimmy 2WD
  • 1988-91 Chevy/GMC 1-Ton Crew Cab 2WD/4WD
  • 1.5'' Tube
  • 3'' Collector
  • Painted Black
  • Ships

    Items You May Also Consider

    11500 is rated 4.6 out of 5 by 10.
    Rated 5 out of 5 by from 87 jimmy crate 350 They came a day early. The install was simple, just remember to take your time removing old bolts. they sound super cool!!
    Date published: 2024-03-06
    Rated 5 out of 5 by from Love my headers Was very pleased with this company got my header super fast
    Date published: 2020-03-20
    Rated 5 out of 5 by from Pretty solid for the money Good build quality and comes with everything you need. I ended up using locking bolts to mount but everything else in the kit was up to par for the money. The headers did hit an XL oil filter that I had on my truck but only slightly.
    Date published: 2019-10-18
    Rated 5 out of 5 by from Excellence in delivery. Flowtech headers Easy installation! Flowtech kit comes with everything except power steering mount header bolt!
    Date published: 2015-06-04
    • y_2024, m_6, d_18, h_7
    • bvseo_bulk, prod_bvrr, vn_bulk_3.0.42
    • cp_1, bvpage1
    • co_hasreviews, tv_6, tr_4
    • loc_en_US, sid_10001_10001_98930, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

    Will they fit my 1978 gmc vandura?

    Asked by: Joey
    The Flowtech 387-11500 header does not fit van models.
    Answered by: jshook
    Date published: 2024-03-21

    Will these fit 85 Chevy truck Silverado 

    Asked by: Dust
    The Flowtech 387-11500 header will fit an '85 Chevy pickup.
    Answered by: jshook
    Date published: 2024-02-28

    Will these fit on a 1972 k20 with a 4 speed manual transmission and small block 350

    Asked by: Ben b
    The Flowtech 387-11500 header will fit a '72 K20 small block. May require clutch linkage modifications.
    Answered by: jshook
    Date published: 2023-04-21

    Will these fit an 89 G20 van

    Asked by: BigBen
    The Flowtech 387-11500 header does not fit an '89 G20.
    Answered by: jshook
    Date published: 2023-03-13
    • y_2024, m_6, d_18, h_7CST
    • bvseo_bulk, prod_bvqa, vn_bulk_3.0.42
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_4
    • loc_en_US, sid_10001_10001_98930, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

    Items You Need

    Related Products

    Flowtech's headers are just the ticket for those who want the best of both worlds - top performance and excellent value. All our Shorty Headers install easily to the factory exhaust system, retaining all stock emissions equipment, and offering maximum ...
    Features:Universal fitment for Small Block Chevy engines1 7/8 in. (.875) mandrel-bent primary tubes2.500 in. collectors with merge spears for increased exhaust velocity3/8 in. (.375) thick header flanges for a leak-free seal2.500 in. V-band flanges and clamps for a superior seal ...
    Flowtech LS Engine Swap Conversion Kit Includes:Flowtech Shorty Headers for Universal GM LS Application - 387-11576FLTEnergy Suspension Motor Mount Inserts (2) - 355-3-1151GHooker Blackheart LS Engine Swap Mount Brackets - 520-71221029Holley LS Engine Retrofit Oil Pan - 510-302-1. GMS-10/S-15.

    Recently Viewed

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.


    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.