170 amp Racing alternator for 63-85 GM - Natural Finish (includes 2 pulleys)


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Most alternators are custom built to order. Standard build time is 2-3 weeks. If you need an alternator sooner than that, please contact a sales associate to see if any in-stock options are available.
18.00 LBS


The S series of 6 phase hairpin alternators offers incredible low RPM output in a compact and durable package. Highly efficient, these units use less horsepower than conventional 3 phase alternators. 12 diodes, twin rectifier plates and outstanding airflow ensure much better durability than standard Delco based alternators, even in severe conditions.

This unit comes with a 2.5" V-Pulley installed and also includes a 2.1" 6 rib serpentine pulley for alternate applications.

This custom designed housing directly replaces standard Delco 10DN, 10SI and 12SI alternators on most 1963 through 1985 GM vehicles. A side output stud and seamless rear cover with a side output plug allow for better clearance from the back of the alternator to the front of the engine and a smooth appearance. A single wire on the provided pigtail gets connected to any ignition switched 12V+ source to turn the alternator on and off with the ignition switch.

Simply run a properly sized positive and ground cable from the alternator to the terminals of the battery and the alternator will work perfectly, regardless of what kind of wiring harness you have. Because of their compact size and standard GM mounting ears, these alternators also work well in many aftermarket or custom bracket installations.

BUICKAll Early ModelsMost Engines 63-79170a
BUICKGran SportAll Engines 65-67170a
BUICKRivieraAll Engines 63-70170a
BUICKSkylarkAll Engines 63-79170a
BUICKWildcatAll Engines 63-70170a
CADILLACAll Early ModelsAll Engines 63-85 170a
CHEVROLETAll Early ModelsMost Engines63-85170a
CHEVROLETC10 Pickup All Engines63-78170a
CHEVROLETCamaroAll Engines67-80170a
CHEVROLETCaprice All Engines66-77170a
CHEVROLETChevelleAll Engines64-73170a
CHEVROLETChevy II All Engines63-68170a
CHEVROLETCorvetteAll Engines63-79170a
CHEVROLETEl CaminoAll Engines64-77170a
CHEVROLETImpalaAll Engines63-77170a
CHEVROLETMalibuAll Engines64-77170a
CHEVROLETMonte CarloAll Engines70-77170a
GMCAll Early ModelsAll Engines63-85170a
GMCC15 PickupAll Engines67-78170a
OLDSMOBILEAll Early ModelsV-863-85170a
OLDSMOBILE442All Engines65-71170a
OLDSMOBILECutlassAll Engines63-76170a
OLDSMOBILEF85All Engines63-72170a
PONTIACEarly modelsV-863-85170a
PONTIACFirebirdAll Engines67-70170a
PONTIACGTOAll Engines64-71170a
PONTIACTempestAll Engines63-70170a
PONTIACVenturaAll Engines71-77170a

2 year performance guarantee.

The MechMan two year warranty applies to Mechman Alternators sold ON or AFTER 07/13/2011. This limited two year warranty allows the customer to return his or her MechMan alternator for repair for a full two years after the alternator purchase date. This warranty does not cover other parts or equipment on the vehicle, and does not cover labor for removal or installation of the alternator. This warranty is VOID if the MechMan alternator is modified, physically abused, misused, improperly installed, or is not used in the application for which it was designed. The MechMan two year warranty is non-transferrable. The customer must include a copy of the original invoice when sending in their alternator in order to receive warranty service. The customer is responsible for shipping the alternator to the Mechman facility for warranty service, Mechman will pay return shipping back to the customer for all alternators under warranty. As an added service, MechMan will also service any MechMan alternator of any age or condition for the cost of parts and return shipping. (We provide the labor to repair the alternator for free!)