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GM Mega Amp - Most Common Straight Across Ear - 6.6" Mount

We have developed a high output alternator in a case that is smaller than the early GM 10SI case. The mounting on this alternator is exactly the same as the Delco 10SI, 12SI, and CS-130 cases or we have a 1" pivot ear that is common to AMC and marine use. It has the following benefits:

  • Amperages up to 320 amp
  • Optional 1-wire regulator
  • 6 Phase stator provides tremendous low RPM output
  • Direct bolt-in replacement for most early GM vehicles
  • Easy mounting for custom applications where space is a concern
  • Great looking custom made billet aluminum case
  • Side output post for better rear clearance
  • Can operate dash charging light with plug-in regulator
  • Superior cooling with dual internal fans to withstand high underhood temperatures
  • Weighs just 12 pounds
  • Dual rectifiers on all units.
  • Output post can be provided on the rear or side for better clearance (side post pictured)

Mega Amp Rear ViewMega Amp Side ViewMega Amp Dimensions


Quality Power
150 Amp max -- 120 amp idle $365.00
200 Amp max -- 140 amp idle $415.00
250 Amp max -- 160 amp idle $450.00
320 Amp max -- 180 amp idle $520.00
Natural billet aluminum
Polished case add $50.00
Chrome case add add $90.00
2” Pivot ear (common on GM vehicles)
1” Pivot ear (used on AMC / Jeep or for custom installations)
Output post out the side
Output post straight out the rear
Plug-in regulator(CS130D/AD244 style)
1-Wire regulator
Set up to use with an External Regulator add $30.00
Single V-Belt Pulley
Double V-Belt Pulley
6 Rib Serpentine Pulley
No Adapter
10DN to Mega amp add $20.00
10SI to Mega Amp add $20.00
CS130/CS144 to Mega Amp add $20.00
New Install Harness (W1223) add $20.00