Regitar USA Knock Sensor f/Mercruiser, Volvo Penta, OMC Inboard Engines: MCM/MIE GM V-8 (454, 502, 540 572 CID) Engines. [RMH004]

• Credit Cards: We accept major credit cards, including Visa, Mastercard, American Express, and Discover.
• Apple Pay & Google Pay: Simplify your checkout process using these digital wallets.
• Shop Pay: For faster checkouts and secure payment processing.

Ground, 2nd Day Air and Next Day Air available ! Same Day Shipping if your order is placed by 4pm Eastern

At Harbor Supply, we aim to ensure you’re completely satisfied with your purchase. If you need to return an item, you have 90 days from the date of delivery to initiate a return.

Eligibility for Returns:

To be eligible for a return:

• The item must be in its original condition—unused, unworn, with all tags still attached, and in its original packaging.
• You’ll need the receipt or proof of purchase.

Please note, returns must be authorized before sending any items back. Items returned without prior authorization will not be accepted.