Pontiac Super Duty, w/Iron Duke heads, hex hsk. Genuine ARP hardware, supplied as kit 290-4101.Fits Pontiac — Iron Duke, Super DutyDetails Kit number: 290-4101 Category: Cylinder Head Product group: Cylinder Heads California Proposition 65 warning⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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