“Awesome, thank you so much for the excellent customer service! “

Gibson Island Boat Works

“Perfect fit and well made. Very happy with the results. Exactly as described, bolted right into place. Couldn’t be happier!”


“The exhaust mixer was perfect fit, I am running and on the water again
Thank you for the quick response, it was a pleasure doing business with you..”


Products on backorder will have longer than normal lead times due to material availability & shipping delays. Please be patient, we are doing our best to get our customers their products quickly. If you have questions about your backordered items, feel free to send us a message via the contact form. Thank you and safe boating.

Introducing HDI Marines New Straight Mixer Series

Introducing Our Latest Release. New Straight Mixer for Custom Exhaust

Shop Straight Mixer Series

Introducing HDI Marine’s Detroit Diesel Replacements

Introducing Our Latest Release. Replacements For Detroit Diesel

Shop All Detroit Diesel Replacements
Detroit Diesel Replacements

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In stock

Replaces: Yanmar P/N 128370-13600, 128370-13610, 128270-13600, 124070-13520, 128370-13610, 104214-13521, 104214-13531, 128990-13520


In stock

This HDI Marine Clamp Replaces Yanmar PN 119773-13300


In stock

Replaces Yanmar PN: 128370-13600 / 128270-13600 / 124070-13520 / 128370-13610 / 104214-13531 /128990-13520


In stock

Replaces Yanmar P/N 119773-13500


In stock

This HDI Marine Clamp Replaces Yanmar P/N 119574-13300 / 119574-13301


In stock

This HDI Marine Item Replaces: Yanmar PN: 129470-13560 / 129670-13561 / 129670-13560

If we currently don’t offer exhaust products for your engine, please contact us we always have NEW PRODUCTS IN DEVELOPMENT. See what’s in the works