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Hedman Header Gaskets Big Block Chevy 396-454 & ZZ502 Square Port

500-27550

made in usa

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Hedman 27550
$14.49
Header Gaskets
  • Big Block Chevy 396-454 & ZZ502 Square Port
  • 2/pkg
  • Ships directly from the manufacturer
    Save $20 off $200, $50 off $500, $100 off $1,000 Orders. Promo Code: SPRINGSAVINGS exclusions apply
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    1973  CHEVROLET P30 VAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454

    1968  GMC K25/K2500 PICKUP

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396

    1973  GMC C15/C1500 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454

    1968  GMC K25/K2500 PICKUP

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396

    1973  GMC C35/C3500 PICKUP

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 454

    1973  CHEVROLET MONTE CARLO

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 454

    1972  GMC C25/C2500 PICKUP

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 402

    1970  CHEVROLET BEL AIR

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 454

    1975  GMC C15 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454

    1973  GMC SPRINT

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 454

    1973  GMC JIMMY

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 454

    1987  CHEVROLET V30

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: N
    • CUI: 454

    1972  GMC C25/C2500 SUBURBAN

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 402

    1975  GMC C15 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: Z
    • CUI: 454

    1973  GMC SPRINT

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM
    • Engine Vin: Y
    • CUI: 454

    1975  CHEVROLET C20 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: Z
    • CUI: 454

    1971  CHEVROLET C10 SUBURBAN

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 402

    1968  CHEVROLET BEL AIR

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 396

    1973  CHEVROLET MALIBU

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: ESTATE
    • Engine Vin: Y
    • CUI: 454

    1980  GMC C2500

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: W
    • CUI: 454

    1976  CHEVROLET C10 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: S
    • CUI: 454

    1979  GMC C3500

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: S
    • CUI: 454

    1988  CHEVROLET V30

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CHEYENNE
    • Engine Vin: N
    • CUI: 454

    1968  CHEVROLET BEL AIR

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 396

    1970  CHEVROLET C20 PICKUP

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 402

    1969  CHEVROLET C20 SUBURBAN

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396

    1972  GMC C35/C3500 PICKUP

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 402

    1965  CHEVROLET BEL AIR

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 396

    1971  CHEVROLET C20 SUBURBAN

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 402

    1968  CHEVROLET EL CAMINO

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM
    • Engine Vin: -
    • CUI: 396

    1971  CHEVROLET C10 PICKUP

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 402

    1973  CHEVROLET G10 VAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454

    1974  CHEVROLET MALIBU

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CLASSIC
    • Engine Vin: X
    • CUI: 454

    1972  CHEVROLET MONTE CARLO

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 402

    1976  CHEVROLET C10 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: S
    • CUI: 454

    1971  CHEVROLET C10 SUBURBAN

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 402

    1972  CHEVROLET EL CAMINO

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SS
    • Engine Vin: E
    • CUI: 400

    1973  GMC K25/K2500 PICKUP

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454

    1973  CHEVROLET K20 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 454

    1976  CHEVROLET IMPALA

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: S
    • Engine Vin: S
    • CUI: 454

    1980  GMC C2500 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: W
    • CUI: 454

    1972  CHEVROLET KINGSWOOD

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 402

    1968  CHEVROLET C20 SUBURBAN

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396

    1974  CHEVROLET MALIBU

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CLASSIC
    • Engine Vin: Y
    • CUI: 454

    1973  CHEVROLET MONTE CARLO

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 454

    1970  CHEVROLET EL CAMINO

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 454

    1976  CHEVROLET C20 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: S
    • CUI: 454

    1979  GMC K3500

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: S
    • CUI: 454

    1973  GMC SPRINT

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM
    • Engine Vin: Y
    • CUI: 454

    1981  GMC K3500

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: W
    • CUI: 454

    1976  GMC C15 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA GRANDE
    • Engine Vin: S
    • CUI: 454

    1975  CHEVROLET C20 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: Z
    • CUI: 454

    1970  CHEVROLET MONTE CARLO

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 400

    1970  CHEVROLET NOVA

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 402

    1970  CHEVROLET EL CAMINO

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SS
    • Engine Vin: K
    • CUI: 400

    1989  CHEVROLET V3500

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: N
    • CUI: 454

    1968  GMC K25/K2500 PICKUP

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 396

    1980  GMC C1500

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: STREET COUPE
    • Engine Vin: W
    • CUI: 454

    1970  CHEVROLET CHEVELLE

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 402

    1987  GMC V3500

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: N
    • CUI: 454

    1968  CHEVROLET K10 SUBURBAN

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396

    1977  GMC K25 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: HIGH SIERRA
    • Engine Vin: S
    • CUI: 454

    1970  CHEVROLET CHEVELLE

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: MALIBU
    • Engine Vin: -
    • CUI: 400

    1969  CHEVROLET K30 PICKUP

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 396

    1973  CHEVROLET CAPRICE

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CLASSIC
    • Engine Vin: X
    • CUI: 454

    1971  CHEVROLET CAPRICE

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 400

    1979  GMC C2500

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SIERRA CLASSIC
    • Engine Vin: S
    • CUI: 454

    1971  CHEVROLET KINGSWOOD

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: ESTATE
    • Engine Vin: -
    • CUI: 402

    1968  CHEVROLET K20 PICKUP

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396

    1971  CHEVROLET CAPRICE

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 400

    1971  CHEVROLET IMPALA

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 400

    1976  CHEVROLET CAPRICE

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CLASSIC ESTATE
    • Engine Vin: S
    • CUI: 454

    1973  CHEVROLET CAPRICE

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CLASSIC
    • Engine Vin: Y
    • CUI: 454

    1973  CHEVROLET C30 PICKUP

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454

    1973  CHEVROLET LAGUNA

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 454

    1970  CHEVROLET EL CAMINO

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 400

    1974  CHEVROLET MALIBU

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CLASSIC
    • Engine Vin: Y
    • CUI: 454

    1972  CHEVROLET CHEVELLE

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: W
    • CUI: 454

    1982  CHEVROLET C20 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SILVERADO
    • Engine Vin: W
    • CUI: 454

    1973  CHEVROLET CHEVELLE

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: DELUXE
    • Engine Vin: X
    • CUI: 454

    1970  CHEVROLET P30 VAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 454

    1973  CHEVROLET K20 PICKUP

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454

    1975  CHEVROLET C20 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM DELUXE
    • Engine Vin: Z
    • CUI: 454

    1972  CHEVROLET TOWNSMAN

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: R
    • CUI: 400

    1976  CHEVROLET K5 BLAZER

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CHEYENNE
    • Engine Vin: S
    • CUI: 454

    1965  CHEVROLET IMPALA

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: -
    • CUI: 396

    1969  CHEVROLET K20 PICKUP

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 396

    1971  CHEVROLET C20 PICKUP

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 402

    1972  CHEVROLET EL CAMINO

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SS
    • Engine Vin: U
    • CUI: 402

    1974  CHEVROLET K10 PICKUP

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 454

    1973  CHEVROLET K20 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454

    1976  CHEVROLET K5 BLAZER

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 454

    1987  CHEVROLET V30

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: SCOTTSDALE
    • Engine Vin: N
    • CUI: 454

    1972  CHEVROLET C20 SUBURBAN

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 402

    1972  CHEVROLET KINGSWOOD

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: ESTATE
    • Engine Vin: V
    • CUI: 454

    1981  CHEVROLET C20 SUBURBAN

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: CUSTOM
    • Engine Vin: W
    • CUI: 454

    1968  CHEVROLET C30 PICKUP

    • Liter: 6.5
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 396

    1972  CHEVROLET C10 SUBURBAN

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 402

    1972  CHEVROLET KINGSWOOD

    • Liter: 6.6
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 402

    1973  GMC K25/K2500 PICKUP

    • Liter: 7.4
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 454

    Hello what the ports size

    Asked by: Steve L
    Here is the Port Size: 1.88'' x 1.92''
    Answered by: Rusty B
    Date published: 2018-04-15
    • y_2020, m_3, d_31, h_12CST
    • bvseo_bulk, prod_bvqa, vn_bulk_3.0.5
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_1
    • loc_en_US, sid_10001_10001_199402, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

    Items You Need

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    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.

    Tools:

    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.