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No one has a better selection of Pontiac 421 than the largest online auction, Ebay.com. Every day, thousands of automotive parts are bought and sold there and for the lowest prices anywhere. Try to do that at your local dealer. We compile a large list of common auto parts so see what we have to offer below. We know you will love what you see there.

   
1961 1962 Pontiac 421 Super Duty Hood Scoop Ford Truck Hot Rod No Grill

1961 1962 Pontiac

1961 1962 Pontiac 421 Super Duty Hood Scoop Ford Truck Hot Rod No Grill

$269.00

Aluminum Valve Covers Polished Retro Finned Pontiac 326 350 389 400 421 455 V8

Aluminum Valve Covers

Aluminum Valve Covers Polished Retro Finned Pontiac 326 350 389 400 421 455 V8

$62.99

1966 Pontiac Heads 421 389

1966 Pontiac Heads

1966 Pontiac Heads 421 389

$829.00

Vintage Offenhauser 2x4 Dual Quad Intake Pontiac 425a 389 421 Sd

Vintage Offenhauser 2x4

Vintage Offenhauser 2x4 Dual Quad Intake Pontiac 425a 389 421 Sd

$230.00

Pontiac 350 455 Retro Finned Polished Aluminum Valve Covers 326 389 400 421 V8

Pontiac 350 455

Pontiac 350 455 Retro Finned Polished Aluminum Valve Covers 326 389 400 421 V8

$62.99

 9770716 63 64 Cylinder Heads 389 421 Ho Gto Tri Power 3x2 Will Ship Last Chance

9770716 63

9770716 63 64 Cylinder Heads 389 421 Ho Gto Tri Power 3x2 Will Ship Last Chance

$850.00

1966 Pontiac Tri Power 389 421 Gto

1966 Pontiac Tri

1966 Pontiac Tri Power 389 421 Gto

$1,300.00

New Pushrod Set Fits Some Pontiac 326 389 421 1968 69 Ford 429 460 V8 Engines

New Pushrod Set

New Pushrod Set Fits Some Pontiac 326 389 421 1968 69 Ford 429 460 V8 Engines

$40.29

Pontiac 301 326 389 400 421 428 455 V8 Hei One Wire Distributor Red Cap Complete

Pontiac 301 326

Pontiac 301 326 389 400 421 428 455 V8 Hei One Wire Distributor Red Cap Complete

$48.50

Pontiac Polish Aluminum Fabricate Valve Cover Finned 326 389 350 400 421 428 455

Pontiac Polish Aluminum

Pontiac Polish Aluminum Fabricate Valve Cover Finned 326 389 350 400 421 428 455

$167.09

62 63 64 Pontiac 421 Fender Badges Emblems Bonneville Grand Prix Pair Fullsize

62 63 64

62 63 64 Pontiac 421 Fender Badges Emblems Bonneville Grand Prix Pair Fullsize

$39.00

1966 Pontiac Wj 421 Four Bolt Main Engine Block

1966 Pontiac Wj

1966 Pontiac Wj 421 Four Bolt Main Engine Block

$4,775.00

Maxx 171 Copper Exhaust Header Gaskets 55 79 Pontiac 326 350 389 400 421 428 455

Maxx 171 Copper

Maxx 171 Copper Exhaust Header Gaskets 55 79 Pontiac 326 350 389 400 421 428 455

$39.99

1962 Pontiac 421 Super Duty 529540 Exhaust Manifold Cut Out Side Dump Sd 389

1962 Pontiac 421

1962 Pontiac 421 Super Duty 529540 Exhaust Manifold Cut Out Side Dump Sd 389

$250.00

Pontiac 421 Super Duty Manifolds Long Branch 980 Cyl Heads Gray Ceramic In out

Pontiac 421 Super

Pontiac 421 Super Duty Manifolds Long Branch 980 Cyl Heads Gray Ceramic In out

$989.00

Pontiac 389 421 Cylinder Heads Pair 538177 Cast Iron Oem Valve Job Complete

Pontiac 389 421

Pontiac 389 421 Cylinder Heads Pair 538177 Cast Iron Oem Valve Job Complete

$500.00

1966 Pontiac Gto 421 389 Ci Oem Heads

1966 Pontiac Gto

1966 Pontiac Gto 421 389 Ci Oem Heads

$700.00

Pontiac Gto Firebird 350 389 400 421 455 670 Cylinder Heads Pair 619

Pontiac Gto Firebird

Pontiac Gto Firebird 350 389 400 421 455 670 Cylinder Heads Pair 619

$949.99

Nos Gm 1966 66 Pontiac Gto Tripower 3 X 2 Trip Cast Iron Intake Manifold 389 421

Nos Gm 1966

Nos Gm 1966 66 Pontiac Gto Tripower 3 X 2 Trip Cast Iron Intake Manifold 389 421

$700.00

67 72 Gto Firebird Valve Covers Drippers 67 81 Pontiac 400 389 455 Chrome

67 72 Gto

67 72 Gto Firebird Valve Covers Drippers 67 81 Pontiac 400 389 455 Chrome

$125.00

Nos Gm Pontiac 1962 Lh Door Skin 421 Super Duty Catalina 4460665

Nos Gm Pontiac

Nos Gm Pontiac 1962 Lh Door Skin 421 Super Duty Catalina 4460665

$675.00

1966 Pontiac Gto Original 093 Cylinder Heads 389 421 Tri Power 4 Speed

1966 Pontiac Gto

1966 Pontiac Gto Original 093 Cylinder Heads 389 421 Tri Power 4 Speed

$1,250.00

Rms314 Pontiac V8 Rear Main Seal 421 428 455 Ia2 And Kre

Rms314 Pontiac V8

Rms314 Pontiac V8 Rear Main Seal 421 428 455 Ia2 And Kre

$46.95

Pontiac 76 Cylinder Heads 389 421 Gto 1965 9778776

Pontiac 76 Cylinder

Pontiac 76 Cylinder Heads 389 421 Gto 1965 9778776

$600.00

Pontiac 326 350 389 400 421 428 455 V 8 Stainless Steel Engine Hex Bolt Kit Set

Pontiac 326 350

Pontiac 326 350 389 400 421 428 455 V 8 Stainless Steel Engine Hex Bolt Kit Set

$53.25

1961 1962 1963 Pontiac 4 Bbl Intake Manifold Afb Carb 389 421 Will Ship

1961 1962 1963

1961 1962 1963 Pontiac 4 Bbl Intake Manifold Afb Carb 389 421 Will Ship

$170.00

Pontiac 350 389 400 421 428 455 Cylinder Heads 13 1970 Model Year

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 13 1970 Model Year

$1,500.00

Pontiac 350 389 400 421 428 455 Cylinder Heads 46

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 46

$1,350.00

Pontiac 350 389 400 421 428 455 Cylinder Heads 670

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 670

$1,500.00

1965 Pontiac Gto Original 776 Cylinder Head 389 421

1965 Pontiac Gto

1965 Pontiac Gto Original 776 Cylinder Head 389 421

$99.00

Stock Capacity Black Oil Pan 59 81 Pontiac 301 326 350 389 400 421 428 455 V8

Stock Capacity Black

Stock Capacity Black Oil Pan 59 81 Pontiac 301 326 350 389 400 421 428 455 V8

$56.95

Pontiac 350 389 400 421 428 455 Cylinder Heads 670

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 670

$2,000.00

Pontiac 350 389 400 421 428 455 Cylinder Heads 16 1968 Model Year

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 16 1968 Model Year

$2,550.00

Pontiac 65 66 421 Yh

Pontiac 65 66

Pontiac 65 66 421 Yh

$3,800.00

Nos Offy Offenhauser Pontiac 1955 60 347 370 389 421 Tripower 3 Stromberg Intake

Nos Offy Offenhauser

Nos Offy Offenhauser Pontiac 1955 60 347 370 389 421 Tripower 3 Stromberg Intake

$395.99

Pontiac Super Duty Tempest 421 Hood Scoop Rat Hot Rod Gasser Catalina 55 Chevy

Pontiac Super Duty

Pontiac Super Duty Tempest 421 Hood Scoop Rat Hot Rod Gasser Catalina 55 Chevy

$400.00

Pontiac 350 389 400 421 428 455 Cylinder Heads 7k3

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 7k3

$2,150.00

Pontiac 350 389 400 421 428 455 Cylinder Heads 670

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 670

$1,750.00

66 Pontiac Fullsize Grand Prix Bonneville 421 Fender Badges Emblems Pair

66 Pontiac Fullsize

66 Pontiac Fullsize Grand Prix Bonneville 421 Fender Badges Emblems Pair

$49.00

1962 1969 Pontiac 421 428 Oem Crank 9770488 Crankshaft 1964 1965 1966 1967 1968

1962 1969 Pontiac

1962 1969 Pontiac 421 428 Oem Crank 9770488 Crankshaft 1964 1965 1966 1967 1968

$539.10

Pontiac 421 428 Ci Nylen 941p 421 026 428 Standard Pistons

Pontiac 421 428

Pontiac 421 428 Ci Nylen 941p 421 026 428 Standard Pistons

$160.00

16 New Pontiac Threaded Rocker Arm Stud With Oil Hole 326 350 389 421 428 455

16 New Pontiac

16 New Pontiac Threaded Rocker Arm Stud With Oil Hole 326 350 389 421 428 455

$48.00

Ford Pontiac Super Duty 421 Gasser Hood Scoop 55 56 57 Chevy Willys Rat Rod 409

Ford Pontiac Super

Ford Pontiac Super Duty 421 Gasser Hood Scoop 55 56 57 Chevy Willys Rat Rod 409

$475.00

Maxx 534k 8 5mm Spark Plug Wires 1955 74 Pontiac 350 389 400 421 428 455 V8 Hei

Maxx 534k 8

Maxx 534k 8 5mm Spark Plug Wires 1955 74 Pontiac 350 389 400 421 428 455 V8 Hei

$48.99

1965 Pontiac Catalina Gran Prix Dual Exhaust Aluminized With 421 Non ho Eng

1965 Pontiac Catalina

1965 Pontiac Catalina Gran Prix Dual Exhaust Aluminized With 421 Non ho Eng

$400.00

Nos 1955 1964 Pontiac Nos Mickey Thompson Cross Ram Intake 389 421 Super Duty

Nos 1955 1964

Nos 1955 1964 Pontiac Nos Mickey Thompson Cross Ram Intake 389 421 Super Duty

$3,999.95

1961 1964 Pontiac 425a Exhaust Manifolds 389ho 421ho Catalina Bonneville Ventura

1961 1964 Pontiac

1961 1964 Pontiac 425a Exhaust Manifolds 389ho 421ho Catalina Bonneville Ventura

$2,500.00

1964 Pontiac Starchief Bonneville Dual Exhaust Aluminized W 421 Ho Engines

1964 Pontiac Starchief

1964 Pontiac Starchief Bonneville Dual Exhaust Aluminized W 421 Ho Engines

$410.00

1966 Pontiac Grand Prix Bonneville 421 Fender Emblems 9784725 26

1966 Pontiac Grand

1966 Pontiac Grand Prix Bonneville 421 Fender Emblems 9784725 26

$225.00

Pontiac 16 Cylinder Heads Gto 350 389 326 400 421 428 455 Will Ship Last Chance

Pontiac 16 Cylinder

Pontiac 16 Cylinder Heads Gto 350 389 326 400 421 428 455 Will Ship Last Chance

$525.00

Pontiac Cylinder Heads 77 Tripower 389 421 Gto 2 2 Will Ship Last Chance

Pontiac Cylinder Heads

Pontiac Cylinder Heads 77 Tripower 389 421 Gto 2 2 Will Ship Last Chance

$750.00

1964 Pontiac Gto 389 421 Tri Power Intake

1964 Pontiac Gto

1964 Pontiac Gto 389 421 Tri Power Intake

$225.00

 1961 Pontiac Bonneville Star Chief Trunk Mat 1962 389 421

1961 Pontiac

1961 Pontiac Bonneville Star Chief Trunk Mat 1962 389 421

$299.99

66 67 Pontiac Firebird Gto 326 389 400 421 4 Bbl Barrel Intake Manifold 9782896

66 67 Pontiac

66 67 Pontiac Firebird Gto 326 389 400 421 4 Bbl Barrel Intake Manifold 9782896

$150.00

Pontiac 6 X 4 Cylinder Heads 350 389 326 400 421 428 455 Will Ship Last Chance

Pontiac 6 X

Pontiac 6 X 4 Cylinder Heads 350 389 326 400 421 428 455 Will Ship Last Chance

$400.00

Pontiac 350 389 400 421 428 455 Cylinder Heads 4x 7h

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 4x 7h

$1,400.00

 59 81 Pontiac V8 Short Chrome Steel Valve Covers 301 350 389 400 421 428 455

59 81

59 81 Pontiac V8 Short Chrome Steel Valve Covers 301 350 389 400 421 428 455

$32.50

Pontiac 350 389 400 421 428 455 Cylinder Heads 64

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 64

$2,500.00

Pontiac 62 Cylinder Heads Gto Ta 350 389 400 421 428 455 Will Ship Last Chance

Pontiac 62 Cylinder

Pontiac 62 Cylinder Heads Gto Ta 350 389 400 421 428 455 Will Ship Last Chance

$525.00

1963 1964 Pontiac 421 Emblems 9770035 Rh 9770036 Bare Castings Original Gm

1963 1964 Pontiac

1963 1964 Pontiac 421 Emblems 9770035 Rh 9770036 Bare Castings Original Gm

$200.00

421ci Pontiac Pistons Rings 1963 64 65 66 Catalina Grand Prix 030

421ci Pontiac Pistons

421ci Pontiac Pistons Rings 1963 64 65 66 Catalina Grand Prix 030

$381.35

Pontiac 350 389 400 421 428 455 Cylinder Heads 96

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 96

$1,750.00

Pontiac 350 389 400 421 428 455 Cylinder Heads 15

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 15

$1,800.00

Rare Original 1961 Pontiac Horn Cap For Econo Steering Wheel Sd421 Catalina

Rare Original 1961

Rare Original 1961 Pontiac Horn Cap For Econo Steering Wheel Sd421 Catalina

$175.00

1966 1968 Pontiac Catalina Gran Prix 2 2 Dual Exhaust aluminized 421 428 Ho

1966 1968 Pontiac

1966 1968 Pontiac Catalina Gran Prix 2 2 Dual Exhaust aluminized 421 428 Ho

$400.00

1966 Pontiac 389 421 Air Conditioning Set Up With Ac Pump Pulleys Brackets

1966 Pontiac 389

1966 Pontiac 389 421 Air Conditioning Set Up With Ac Pump Pulleys Brackets

$800.00

1964 Pontiac Grand Prix 421 Ho Tri Power Rh Taillight Assembly 5955618 5955472

1964 Pontiac Grand

1964 Pontiac Grand Prix 421 Ho Tri Power Rh Taillight Assembly 5955618 5955472

$100.00

Rear Pcv Tripower Valley Pan 59 67 Pontiac Gto Gp Bonneville Ventura 326 389 421

Rear Pcv Tripower

Rear Pcv Tripower Valley Pan 59 67 Pontiac Gto Gp Bonneville Ventura 326 389 421

$158.50

Pontiac 350 389 400 421 428 455 Cylinder Heads 7m5

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 7m5

$1,550.00

Ac Delco Fuel Pump 1966 Pontiac Gto Pontiac Lemans Pontiac 389 421 Tempest 326

Ac Delco Fuel

Ac Delco Fuel Pump 1966 Pontiac Gto Pontiac Lemans Pontiac 389 421 Tempest 326

$99.99

Vintage Offenhauser 2x4 Dual Quad Intake Pontiac Offy 425a 389 421 Sd Super Duty

Vintage Offenhauser 2x4

Vintage Offenhauser 2x4 Dual Quad Intake Pontiac Offy 425a 389 421 Sd Super Duty

$449.00

Clevite Pontiac 421 428 455 Rod Main Bearings With Durabond Cam Bearings 63 76

Clevite Pontiac 421

Clevite Pontiac 421 428 455 Rod Main Bearings With Durabond Cam Bearings 63 76

$263.99

1960 63 Pontiac Catalina Ventura 421 sd N o s Voltage Regulator Pt 1119511

1960 63 Pontiac

1960 63 Pontiac Catalina Ventura 421 sd N o s Voltage Regulator Pt 1119511

$349.99

Pontiac 350 389 400 421 428 455 Cylinder Heads 62

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 62

$2,150.00

421 389 Rare Pontiac Gp Grand Prix 1962 62 Passenger Fender Oem Gm Catalina

421 389 Rare

421 389 Rare Pontiac Gp Grand Prix 1962 62 Passenger Fender Oem Gm Catalina

$200.00

Nos 1965 1966 Pontiac Olds Tri Power Air Filters 421 2 2 Ho Gto 442

Nos 1965 1966

Nos 1965 1966 Pontiac Olds Tri Power Air Filters 421 2 2 Ho Gto 442

$89.00

Pontiac 1965 Factory Carter Carburetor For 421 W Stick Trans

Pontiac 1965 Factory

Pontiac 1965 Factory Carter Carburetor For 421 W Stick Trans

$95.00

1965 1968 Pontiac Console Bezel 421 428 Convertible

1965 1968 Pontiac

1965 1968 Pontiac Console Bezel 421 428 Convertible

$205.00

Pontiac 6 X 8 Cylinder Heads Gto 389 400 421 428 455 Will Ship Last Chance

Pontiac 6 X

Pontiac 6 X 8 Cylinder Heads Gto 389 400 421 428 455 Will Ship Last Chance

$400.00

Pontiac V 8 Exhaust Manifold 538238 Left Driver Side 326 389 421 Inv 363

Pontiac V 8

Pontiac V 8 Exhaust Manifold 538238 Left Driver Side 326 389 421 Inv 363

$99.00

Engine Intake Manifold Edelbrock 29575 Pontiac 326 350 389 400 421 428 455

Engine Intake Manifold

Engine Intake Manifold Edelbrock 29575 Pontiac 326 350 389 400 421 428 455

$469.99

Pontiac 350 389 400 421 428 455 Cylinder Heads 16

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 16

$1,500.00

Pontiac 350 455 Retro Finned Black Aluminum Valve Covers 326 389 400 421 V8

Pontiac 350 455

Pontiac 350 455 Retro Finned Black Aluminum Valve Covers 326 389 400 421 V8

$77.99

Pontiac 350 389 400 421 428 455 Cylinder Heads 76

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 76

$1,550.00

Pontiac 350 389 400 421 428 455 Cylinder Heads 061

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 061

$1,500.00

1963 1964 Gto Pontiac Exhaust Manifolds 389 421 545467 545470 Bonneville Ventra

1963 1964 Gto

1963 1964 Gto Pontiac Exhaust Manifolds 389 421 545467 545470 Bonneville Ventra

$98.76

Pontiac 350 389 400 421 428 455 Cylinder Heads 092

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 092

$1,550.00

1959 75 All Pontiac Cars Pontiac 421 Flags Fender Emblems Pair

1959 75 All

1959 75 All Pontiac Cars Pontiac 421 Flags Fender Emblems Pair

$97.00

Pontiac 350 389 400 421 428 455 Cylinder Heads 16

Pontiac 350 389

Pontiac 350 389 400 421 428 455 Cylinder Heads 16

$1,550.00

Pontiac 421 Intake Manifold 9778818

Pontiac 421 Intake

Pontiac 421 Intake Manifold 9778818

$175.00

61 65 Pontiac Bonneville Catalina Oem Tri power Air Cleaner Assembly 421 389 Gto

61 65 Pontiac

61 65 Pontiac Bonneville Catalina Oem Tri power Air Cleaner Assembly 421 389 Gto

$1,097.00

Pontiac Carter Hi Performance Fuel Pump 326 350 389 400 455 421 428 X Cast

Pontiac Carter Hi

Pontiac Carter Hi Performance Fuel Pump 326 350 389 400 455 421 428 X Cast

$89.99

1964 79 Pontiac V8 Cast Connecting Piston Rods Fit 326 350 389 400 421 428

1964 79 Pontiac

1964 79 Pontiac V8 Cast Connecting Piston Rods Fit 326 350 389 400 421 428

$54.95

Pontiac 389 400 421 428 455 Oil Pan

Pontiac 389 400

Pontiac 389 400 421 428 455 Oil Pan

$129.95

Pontiac 326 389 421 Push Rods Pushrods Set 16 1961 62 63 64 65 66 67 Gto

Pontiac 326 389

Pontiac 326 389 421 Push Rods Pushrods Set 16 1961 62 63 64 65 66 67 Gto

$46.40

Arp 190 3602 Cylinder Head Bolt Fasteners Pontiac 326 389 421 Hex

Arp 190 3602

Arp 190 3602 Cylinder Head Bolt Fasteners Pontiac 326 389 421 Hex

$79.99

 1963 Pontiac Bonneville Star Chief Nos Rocker Moldings 389 421

1963 Pontiac

1963 Pontiac Bonneville Star Chief Nos Rocker Moldings 389 421

$299.99

Nos Vintage Offenhauser Tri Power Intake Pontiac Offy 425a 389 421 Sd Super Duty

Nos Vintage Offenhauser

Nos Vintage Offenhauser Tri Power Intake Pontiac Offy 425a 389 421 Sd Super Duty

$598.90