Replacement for MODEL 8.1S HORIZON ENGINE - MARINE YEAR: ALL MODELS GM 8.1L - 496CI - 8CYL ALTER (for MERCRUISER) and others

Replacement for MODEL 8.1S HORIZON ENGINE - MARINE YEAR: ALL MODELS GM 8.1L - 496CI - 8CYL ALTER (for MERCRUISER) and others

During the checkout process, you can choose from expedited services such as overnight delivery to standard ground shipping. We aim to ensure your order is delivered promptly and reliably, wherever you are.

All returns must be made within 30 days of purchase with the invoice. (After 30 days, Interlight credit only, Minimum 25% restocking fee, no returns after 60 days, special items order just for you are not returnable.)

At Interlight, your satisfaction is our priority. We offer a 30-day money-back guarantee on eligible products, provided they are returned in resalable condition with the original invoice.