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The iconic W-Series big block engines from General Motors could always be spotted by the uniquely shaped heads and rocker covers for a distinctive appearance. Three different variations of the W-Series engines existed with the 348, 409, and 427 big block. Arguably the most popular of the three was the high performance 409, built with drag racing and high torque loads in mind. Today, the 409 is still a highly sought after engine for restorers, rodders, and racers. The folks here at Speedway Motors know what it takes to bring that old school big block back to life and you can be sure to find what you’re looking for with only the top brands and parts you need for your classic W-Series big block Chevy.

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Many Engines, Automatic and Manual Transmission Type

Ships Free

Transmission Type: Automatic and Manual

Starter Size: Full Size

Starter Output (kW/hp): 1.4 kW / 1.8 hp

Starter Output (ft. lbs.): 100 ft.-lbs. torque

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Many Engines, Automatic and Manual Transmission Type

Ships Free

Transmission Type: Automatic and Manual

Starter Size: Full Size

Starter Output (kW/hp): 1.4 kW / 1.8 hp

Starter Output (ft. lbs.): 100 ft.-lbs. torque

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Many Engines, One Wire Alternator, Serpentine Belt Type

Ships Free

One Wire Alternator: Yes

Belt Type: Serpentine

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

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Many Engines, One Wire Alternator, Satin

Ships Free

One Wire Alternator: Yes

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

Voltage Required: 12-Volt

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Many Engines, One Wire Alternator, Serpentine Belt Type

Ships Free

One Wire Alternator: Yes

Belt Type: Serpentine

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

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Many Engines, Automatic and Manual Transmission Type

Ships Free

Transmission Type: Automatic and Manual

Starter Size: Full Size

Starter Output (kW/hp): 1.4 kW / 1.8 hp

Starter Output (ft. lbs.): 100 ft.-lbs. torque

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Many Engines, One Wire Alternator, Polished

Ships Free

One Wire Alternator: Yes

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

Voltage Required: 12-Volt

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Many Engines, One Wire Alternator, Serpentine Belt Type

Ships Free

One Wire Alternator: Yes

Belt Type: Serpentine

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

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Many Engines, One Wire Alternator, Serpentine Belt Type

Ships Free

One Wire Alternator: Yes

Belt Type: Serpentine

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

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Many Engines, One Wire Alternator, Polished

Ships Free

One Wire Alternator: Yes

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

Voltage Required: 12-Volt

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Many Engines, GM 10DN Alternator Case Style, Satin

Ships Free

One Wire Alternator: No

Alternator Case Style: GM 10DN

Alternator Amperage: 70 amp

Voltage Required: 12-Volt

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$172.99
$230.99

283, 327, 396, 427, 348, 409

Ships Free
On Sale
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Many Engines, One Wire Alternator, Serpentine Belt Type

Ships Free

One Wire Alternator: Yes

Belt Type: Serpentine

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

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Many Engines, One Wire Alternator, Chrome plated

Ships Free

One Wire Alternator: Yes

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

Voltage Required: 12-Volt

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Many Engines, One Wire Alternator, Polished

Ships Free

One Wire Alternator: Yes

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

Voltage Required: 12-Volt

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Many Engines, One Wire Alternator, Polished

Ships Free

One Wire Alternator: Yes

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

Voltage Required: 12-Volt

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348, 409, Mechanical Water Pump Type, Natural, Natural

Ships Free
On Sale

Water Pump Type: Mechanical

Water Pump Style: Short

Housing Material: Aluminum

Housing Finish: Natural

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Many Engines, One Wire Alternator, Serpentine Belt Type

Ships Free

One Wire Alternator: Yes

Belt Type: Serpentine

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

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Many Engines, One Wire Alternator, V-Belt Belt Type

Ships Free

One Wire Alternator: Yes

Belt Type: V-Belt

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

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Many Engines, One Wire Alternator, Serpentine Belt Type

Ships Free

One Wire Alternator: Yes

Belt Type: Serpentine

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

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Many Engines, One Wire Alternator, Black powdercoated

Ships Free

One Wire Alternator: Yes

Alternator Case Style: GM 12SI

Alternator Amperage: 80 amp

Voltage Required: 12-Volt

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Many Engines, One Wire Alternator, Polished

Ships Free

One Wire Alternator: Yes

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

Voltage Required: 12-Volt

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Many Engines, Mechanical/Solid Flat Tappet Lifter Type

Ships Free

Lifter Type: Mechanical/Solid Flat Tappet

Lifter Body Diameter: 0.842"

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Many Engines, One Wire Alternator, Serpentine Belt Type

Ships Free

One Wire Alternator: Yes

Belt Type: Serpentine

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

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348, 409, Mechanical Water Pump Type, Natural, Natural

Ships Free

Water Pump Type: Mechanical

Pump Flow: Standard

Adjustable: No

Housing Material: Cast-Iron

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Many Engines, One Wire Alternator, Chrome plated

Ships Free

One Wire Alternator: Yes

Alternator Case Style: GM 12SI

Alternator Amperage: 100 amp

Voltage Required: 12-Volt

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