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12Si Series



1983-1986 Delco Remy Type 12Si Series Internal Regulator, External Fan Alternator

The 12Si series alternator has the same outside dimensions as the 10Si series alternator (shown below) and will fit in it's place without modification. The 12Si series alternator has several design improvements over the 10Si series that make it the better choice between the two.

Improvements include:
  • Larger Rectifier to handle higher amperage
  • Wider Stator and Rotor:
    • Improved Magnetism for better Low End Output
    • Increased Mass for better Heat Dissipation
  • Larger Cooling Holes at back for better cooling of Rectifier, Stator and Other Internal Components
  • High Volume Axial Turbo Fan for Greater Air Flow through the alternator
12si series alternator
Available in several amperage levels both standard hookup and self exciting (one wire) voltage regulators.


Displaying products 1 - 33 of 33 results
Part # D112Si94MSE - 12Si 94M Amp Marine type 12Si Series SE (One Wire) Alternator
Price: $139.95
Part #  D112Si94MSE  - 12Si 94M Amp Marine type 12Si Series SE (One Wire) Alternator
Delco Remy type 12Si series 94 amp single bridge rectifier alternator, with self exciting (one wire) voltage regulator.
# 7273M 105A - Alternator, Aftermarket, Delco Type 12Si Series, Standard 3-Wire Regulator, 12 Volt / 105 Amp Rated Output-1
Price: $119.95
# 7273M 105A - Alternator, Aftermarket, Delco Type 12Si Series, Standard 3-Wire Regulator, 12 Volt / 105 Amp Rated Output-1
105 Amp Delco Remy type 12Si series alternator with standard, internal voltage regulator.
# 7278M - Alternator, 78 Amp/12 Volt, CW, 1-Groove Pulley, Delco 12SI Series
Price: $100.00
# 7278M - Alternator, 78 Amp/12 Volt, CW, 1-Groove Pulley, Delco 12SI Series
78 Amp Delco 12Si type compatible alternator. Aftermarket unit made with the best possible components, built to OEM specifications.
# 7294M - Alternator, Aftermarket, Delco Type 12Si Series, Standard 3-Wire Regulator, 12 Volt / 94 Amp Rated Output
Price: $110.00
# 7294M - Alternator, Aftermarket, Delco Type 12Si Series, Standard 3-Wire Regulator, 12 Volt / 94 Amp Rated Output
7294M-3N 94 Amp 12Si Series Alternator 94 Amp/12 Volt, CW, 3-Wire System. Lester Nos: 7272, 7272-3, 7273, 7273-3, 7294, 7294-3
7273M A94 - Delco-Remy type 12Si series Alternator with Standard Voltage Regulator, 100% New, TOP QUALITY
Price: $129.95
7273M A94 - Delco-Remy type 12Si series Alternator with Standard Voltage Regulator, 100% New, TOP QUALITY
Delco-Remy type 12Si series alternator 100% New, TOP QUALITY
7273M SE94 Amp 12Si Series Self Exciting (One-Wire) Alternator
Price: $119.95
7273M SE94 Amp 12Si Series Self Exciting (One-Wire) Alternator
Delco-Remy type 12Si series alternator, Self Exciting regulator. 100% New, TOP QUALITY
unavailable
Part No.D1-12SI-C-105
Price: $159.95
Part No.D1-12SI-C-105
Chrome 105 Amp GM Delco-Remy Type 12-SI Alternator W/Standard Internal Regulator
unavailable
Part No.D1-12SI-C-140
Price: $169.95
Part No.D1-12SI-C-140
Chrome 140 Amp GM Delco-Remy Type 12-SI Alternator W/Standard Internal Regulator
unavailable
Part No.D1-12SI-C-170
Price: $179.95
Part No.D1-12SI-C-170
Chrome 170 Amp GM Delco-Remy Type 12-SIAlternator W/Standard Internal Regulator
unavailable
Part No.D1-12SI-CSE-105
Price: $149.95
Part No.D1-12SI-CSE-105
Chrome 105 Amp GM Delco-Remy Type 12-SI Alternator W/Self-exciting Internal Regulator
unavailable
Part No.D1-12SI-CSE-140
Price: $179.95
Part No.D1-12SI-CSE-140
Chrome 140 Amp GM Delco-Remy Type 12-SI Alternator W/Self-exciting Internal Regulator
unavailable
Part No.D1-12SI-CSE-170
Price: See part # CS144-SE170C
Part No.D1-12SI-CSE-170
Chrome 170 Amp GM Delco-Remy Type 12-SI Alternator W/Self-exciting Internal Regulator
# 7273M 140A - Alternator, Aftermarket, Delco Type 12Si Series, Standard 3-Wire Regulator, 12 Volt / 140 Amp Rated Output
Price: $149.95
# 7273M 140A - Alternator, Aftermarket, Delco Type 12Si Series, Standard 3-Wire Regulator, 12 Volt / 140 Amp Rated Output
Part # D17273MA140 - Delco Remy type 140 Amp 12Si High Output Alternator with Standard Hook up Voltage Regulator Alternator
7273M A170 Amp 12Si Series Standard Voltage Regulator Alternator
Price: See CS144-A170
7273M A170 Amp 12Si Series Standard Voltage Regulator Alternator
170 Amp Delco Remy type 12Si series alternator with standard, internal voltage regulator.
# 7273M 105A - Alternator, Aftermarket, Delco Type 12Si Series, Standard 3-Wire Regulator, 12 Volt / 105 Amp Rated Output
Price: $119.95
# 7273M 105A - Alternator, Aftermarket, Delco Type 12Si Series, Standard 3-Wire Regulator, 12 Volt / 105 Amp Rated Output
7273M-A105 Delco Type 12Si Series, Standard Voltage Regulator, 105 Amp Alternator
7273M SE105 Amp 12Si Series Self Exciting (One-Wire) Alternator
Price: $129.95
7273M SE105 Amp 12Si Series Self Exciting (One-Wire) Alternator
105 Amp Delco Remy type 12Si series alternator with self exciting, internal voltage regulator.
7273M SE140 Amp 12Si Series Self Exciting (One-Wire) Alternator
Price: $169.95
7273M SE140 Amp 12Si Series Self Exciting (One-Wire) Alternator
140 Amp Delco Remy type 12Si series alternator with self exciting, internal voltage regulator.
# 7273M 170SE - Alternator, Aftermarket, Delco Type 12Si Series, Self Exciting 1-Wire Regulator, 12 Volt / 170 Amp Rated Output
Price: See part # CS144-A170SE
# 7273M 170SE - Alternator, Aftermarket, Delco Type 12Si Series, Self Exciting 1-Wire Regulator, 12 Volt / 170 Amp Rated Output
170 Amp Delco Remy type 12Si series alternator with self exciting, internal voltage regulator.

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