The 18577 is a 24v 8.0 kw starter, a new aftermarket direct replacement engineered to match the fit, form, and function of the original starter. Specifications: - Voltage: 24V - Power: 8.0 kW - Pinion teeth: 12 Confirm exact fitment with your year, make, and model before ordering. Cross-Reference / Interchange Numbers: - Replaces / compatible with: 18577, 19153, 19153, 3745N, 41-3745, 41-6508, 428000-1450, 428000-1451, 438000-3740, 6508N (plus 8 more on file). Why ePartsGlobal: specialist in heavy-duty starters, alternators, and charging-system electrical parts. Backed by a 1-year warranty, free shipping on orders over $19.95, and fast fulfillment. Ships from USA.