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GDR is the leading online distributor of Cummins Engine and Parts. We offer an unrivaled selection of truck,construction machinery,generator set engine parts, upgrades and repair solutions for applications of all types. Whether you’re a weekend warrior looking to perform some basic maintenance on your engine or a certified mechanic looking to get started on a complete engine overhaul for a large machine, we’ve totally got you covered.

GDR distinguishes itself in the market not only with our enormous inventory of products, but also with our highly competitive prices and fully trained technical sales staff. We constantly shop prices in order to save our customers time spent in comparison. Find a better price elsewhere? We beg you to bring it to our attention so we can do our best to beat it.

If you have a problem, we know exactly how to help. When you contact GDR, you will immediately find comfort in knowing that we are not just inexperienced "Order-takers." GDR is based out of Central China's largest and most established Cummins Engine Machine Shop,We KNOW engines and, chances are, we’ve already encountered your issue. Count on us to put in the work to get you fixed correctly, the first time.

We have the part you need. We offer tens of thousands of parts. So many, in fact, that our offering reaches far beyond what is visible on our website. If you need something specific and don’t see it, just give us a call. We’ve got parts from On-Road Truck applications to Agricultural to Marine, and everything in between! GDR truly is your one-stop shop.

You don’t have time to waste. Forget flipping through old dusty catalogs hoping to find what you need. Heavy Duty Pros has invested heavily in manufacturer specific software and numerous other resources in order to quickly find exactly what you're looking for. Our parts lookup database and engine specification index reach much deeper than our competitors.

Our warranty says it all. Sometimes, these days, you come across a deal that seems too good to be true. Oftentimes it is. You won’t find that here. Heavy Duty Pros offers an industry leading warranty on our parts because we take great pride in our quality. We intentionally purchase from our manufacturers in high volume in order to keep our prices low, but quality is never compromised. Everything we offer is tried and true. If our own mechanics wouldn’t use certain parts on builds in our machine shop, we wouldn’t offer them to our customers. It’s as simple as that. You don’t have time for failures and neither do we.

Our inventory is continuously expanding and we make it a point to give our customers exactly what they need, even if it means going out of our way. The success of our clients serves as testament to our track record, and while our range of products cover virtually any engine model produced by some of the most prominent manufacturers including Cat, Cummins, International and Detroit Diesel, you can be assured that we’ll get you exactly what you need, whatever and wherever it may be.