Whether you are looking to fix up or get the most out of your Chevy or GMC diesel trucks, Next Gen Diesel has you covered. We carry a wide range of aftermarket Allison 2020 parts, components, and transmissions. Top brands in the industry manufacture each of our products, ensuring they will last for years to come. Our selection of Allison transmissions includes street, competition, performance, and superstock models. The competition model is the most powerful and compatible with engines up to 1500 HP. If you prefer to fix up your transmission yourself, we recommend one of our rebuild kits. These kits include all the parts you’ll need to get the job done. Check out our selection of Allison 2020 parts, transmissions, and rebuild kits today!
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