Professional research and development quality regulators and rectifiers.
With more than 10 years experience of production.
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PARAMETER
• Delco 17SI Series 120A; 21SI, 22SI, 23SI, 33SI, 34SI Series IR/EF Alternators• 6-jumbo button diodes (non-avalanche)• Notes - For heavy duty version w/ press-fit diodes, use DR5173PF.,For version w/ 3-avalanche diodes use DR5175.,For version w/ 6-avalanche diodes use DR5174.• Replaces - DELCO 1988976, D3987