The Edelbrock 50459 is an E-Street aluminum oval port cylinder head for Mark IV big-block Chevrolet V8s: 396, 402, 427, 454 and 502. It has as-cast ports, 290 cc intake runners, 110 cc combustion chambers, 2.19 in intake and 1.88 in exhaust valves, and a 26 degree valve angle. It comes complete with valves, springs and retainers for flat tappet camshafts and is designed for an operating range of idle to 5,500 RPM. Sold as a single head.
Notes:
- Sold individually; order two for a V8.
- Valve springs: 1.50 in diameter, 0.700 in maximum lift.
- Uses 7/16 in pushrods and 7/16 in rocker studs, with hardened steel guide plates.
- Horsepower range: 400-500 HP.
Specifications:
- Brand: Edelbrock
- Part Number: 50459
- Part Type: Engine Cylinder Head
- Series: E-Street
- Material: Aluminum
- Intake Valve Diameter: 2.19 in
- Valve Angle: 26 Degree
- Intake Runner Volume: 290 cc
- Guide Plate Material: Hardened Steel
- Camshaft Type: Flat Tappet
- Horsepower: 400-500 HP
- Seat Angle: Exhaust 45 deg/Intake 45 deg
- Pushrod Diameter: 0.4375 (7/16) in
- Rocker Stud Diameter: 0.4375 (7/16) in
- Valve Spring Diameter: 1.50 in
- Valve Spring Maximum Lift: 0.700 in
- Valve Stem Diameter: 0.3438 in
- Combustion Chamber Volume: 110 cc
- Retainer Included: Yes
- Valve Included: Yes
- Deck Thickness: 0.5625 in
- Exhaust Valve Diameter: 1.88 in
- Guide Plates Included: Yes
- Seat Material: Ductile Iron
- Exhaust Port Location: Standard
- Exhaust Runner Volume: 110 cc
- EGR Port: No
- Guide Material: Manganese Bronze
- Construction Type: Complete
- Valve Springs Included: Yes
- Sold as: Each
- Manufacturer warranty: 12 months
Engine Applications
- Chevrolet Big-Block Mark IV: 396 (6.6L), 402 (6.6L), 427 (7.0L), 454 (7.4L), 502 (8.2L)
Vehicle Applications
- Chevrolet: Bel Air 1963, 1965-1975; Biscayne 1963, 1965-1972; Blazer 1973-1974; Brookwood 1969-1972; C10 1975-1980; C10 Pickup 1968-1974; C10 Suburban 1968-1980; C20 1975-1986; C20 Pickup 1968-1974; C20 Suburban 1968-1986; C30 1975-1986; C30 Pickup 1968-1974; Camaro 1967-1972; Caprice 1966-1976; Chevelle 1965-1973; Chevy II 1968; Corvette 1965-1974; El Camino 1966-1975; Estate 1969-1970; G10 Van 1973-1974; G20 1976; G20 Van 1973-1974; G30 1975-1976; G30 Van 1973-1974; Impala 1963, 1965-1976; K10 1976-1980; K10 Pickup 1968-1974; K10 Suburban 1968-1974; K20 1976-1978; K20 Pickup 1968-1974; K20 Suburban 1968-1972; K30 Pickup 1968-1974; K5 Blazer 1976-1978; Kingswood 1969-1972; Laguna 1973-1975; Malibu 1965-1967, 1973-1975; Monte Carlo 1970-1975; Nova 1969-1972; R30 1987-1988; R3500 1989; Townsman 1969-1972; V30 1987-1988; V3500 1989
- GMC: C15 1975-1978; C15 Suburban 1975-1978; C15/C1500 Pickup 1968-1974; C15/C1500 Suburban 1968-1974; C1500 1979-1980; C1500 Suburban 1979-1980; C25 1975-1978; C25 Suburban 1975-1978; C25/C2500 Pickup 1968-1974; C25/C2500 Suburban 1968-1974; C2500 1979-1986; C2500 Suburban 1979-1986; C35 1975-1978; C35/C3500 Pickup 1968-1974; C3500 1979-1986; G25 1975-1976; G35 1976; G35/G3500 Van 1973-1974; K15 1976; K15/K1500 Pickup 1968-1974; K15/K1500 Suburban 1968-1974; K1500 1980; K25 1976-1978; K25 Suburban 1976-1977; K25/K2500 Pickup 1968-1974; K25/K2500 Suburban 1968-1974; K35/K3500 Pickup 1968-1974; K3500 1979-1986; R3500 1987-1989; Sprint 1971-1975; V3500 1987-1989
- Pontiac: Acadian 1968-1971; Beaumont 1965-1969; Laurentian 1966-1970; Parisienne 1966-1970; Strato-Chief 1965-1970
Grouped by make, with model years for each model (79 models, 432 year, make and model combinations).
Fits only vehicles equipped with a Mark IV big-block Chevrolet V8.
Emissions Status
- For use on pre-pollution-controlled vehicles: 1965 and older U.S.-manufactured California-certified vehicles, 1967 and older U.S.-manufactured federally certified vehicles, and 1967 and older foreign-manufactured vehicles.
- For engine swaps into uncontrolled or pre-pollution-controlled vehicles. Not legal for use on pollution-controlled vehicles.
FAQ
What engines does the Edelbrock 50459 fit?
Mark IV big-block Chevrolet V8s: 396, 402, 427, 454 and 502.
What are the port and chamber sizes of the 50459?
290 cc oval intake ports and 110 cc combustion chambers, with 2.19 in intake and 1.88 in exhaust valves.
Is the 50459 sold as a pair?
No. It is a single complete head, so a V8 needs two.
What camshaft is the 50459 set up for?
Flat tappet camshafts. The 1.50 in valve springs are rated to 0.700 in maximum lift.
Is the Edelbrock 50459 street legal?
It is not 50-state legal. Its emissions status is for pre-pollution-controlled vehicles and engine swaps into those vehicles.
California Proposition 65: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.
