Our SPX series high-output alternators are the ultimate upgrade when you need the absolute biggest and most sophisticated high output alternator on the planet. All of our SPX series alternators are designed for one purpose, brute force idle output. When you need the most extreme idle output with the most sophisticated integrated alternator-monitoring system to prevent thermal failures is where the SPX alternator delivers. Every Nations product we sell is held to the strictest quality standards in the industry. We only use 100% brand new USA made components along with one of the most rigorous testing before each individual alternator leaves our shop. Each SPX series alternator comes standard with our custom hard-anodized billet aluminum pulley and 2-year replacement warranty. If you're looking for a significant overall increase in top end and idle output, the SPX series alternator is your solution.
Quick Overview
| Mounting Type | Direct fit to OEM Mounting |
| Output Voltage | 14.8 |
| Idle Amperage | 225 |
| Hot Idle Amperage @ 200ºF | 175 |
| Max Amperage | 300 |
| Hot Max Amperage @ 200ºF | 250 |
| Pulley | 6 Groove Hard Anodized 6061 Billet Aluminum |
| Doesn't affect vehicles PCM, Check Engine Light or Charge Light | Yes - Direct plug-in OEM PCM Compliant |
| SKU | 8243-300-SPX |
| Stator Configuration | 3 Phase slot-wound |
| Average A/C Ripple Current | 45 Amps |
| Positive Output Stud Size | 8MM x 1.25 Copper |
| Temperature Compensation | Yes with 3-Step Thermal Protection |
| Rectifier | 12 75 amp press fit bosch diodes |
| Rectifier Heatsink | Aluminum |
| Warranty Duration | 2 Years |
