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Fortis Equipment Funding: Our Trusted Lender

We recommend Fortis Equipment Funding to our customers.

We refer a lot of our clients to Fortis Equipment Funding for their commercial equipment meeting our customers’ needs. At Select Reman Exchange, we’ve had the privilege of working with Fortis Financing as our commercial equipment lender for several years, and we can’t emphasize enough how much we appreciate their unwavering support. Fortis Equipment Funding has consistently proven itself to be a reliable and dedicated financial partner, helping us increase engine sales and overcome various challenges. Their commitment to understanding our industry and their flexible financing solutions have been instrumental for us at SRX. We highly recommend Fortis!

Our Experience

“I get a lot of customers that call and ask us if we offer in-house financing for engines,” said Select Reman Exchange General Manager, Clay Conn. It’s a recurring situation and the go-to solution for SRX is to refer to Fortis. “It’s a very smooth, effortless, transaction every time,” added Conn.

“Having a reputable company that is looking out for both the customer’s and our best interests at the same time,” said Conn. It’s really indispensable as a business owner to have a great relationship like this.

Fortis’ Expertise

Fortis supports Select Reman Exchange in serving our customers and one of the key reasons we hold Fortis in such high regard is their deep understanding of the commercial equipment industry. They don’t just provide financing; they take the time to familiarize themselves with our business model, the intricacies of our equipment needs, and the challenges we face. This industry-specific knowledge allows them to tailor their financing solutions to our exact requirements, ensuring that we have access to the capital needed to purchase, maintain, and upgrade our machinery effectively.

Moreover, Fortis’ flexibility is truly commendable. In a fast-paced and ever-evolving industry, their willingness to adapt to our changing needs has been a game-changer. They’ve provided us with various financing options, including equipment leasing, working capital loans, and equipment upgrade programs, enabling us to manage our cash flow efficiently and seize growth opportunities. Their quick response times and streamlined application process have made working with them a hassle-free experience.

In conclusion, our partnership with Fortis Equipment Funding has been an integral part of Select Reman Exchange’s success. Their industry expertise, flexibility, and unwavering support have allowed us to thrive and expand, providing our customers with top-quality remanufactured equipment. We wholeheartedly appreciate their commitment to our business, and we look forward to a long and prosperous collaboration in the years to come.

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The Ultimate Heavy Haul Engine

The holy grail of engines is the C15 Acert MXS lower end with a single turbo 6NZ head. When the goal is to assemble the most reliable diesel engine possible — of course you don’t prioritize putting the biggest power numbers to the ground. Ultimately this reliability results in the most profit.

At Select Reman Exchange (SRX), we believe an appropriately powerful yet reliable engine can be in service for a million miles. When it does have issues, it is easy to work on because it doesn’t have EGR, DPF, or twin turbos.

Our build details

Our vast experience as diesel engine remanufacturers at SRX informs our opinions and recommendations for the ultimate heavy haul engine configuration. Using the MXS lower end you have a stronger, better quality casted cylinder block.

The crankshafts are the same between the engines, but You have a stronger connecting rod with 4-rod bolts instead of 2 connecting rod bolts like the 6NZ has. When building the MXS lower you can use the industrial piston pack out of a JRE C15 engine to achieve the same 16:1 compression ratio that the 6NZ has. This lower compression is better for bigger power and reliability.

One-piece MXS steel piston

They hold up to a lot more power and are more reliable than that two-piece 6NZ piston with the steel crown and aluminum piston skirt. The MXS lower end also has a higher-flowing cooling system. The water pump is larger and flows more keeping the engine cooler under higher load scenarios. 

Use new casted cylinder heads

Don’t use a remanufactured caterpillar head. They are prone to cracking. We offer an aftermarket casted cylinder head that has a better, thicker casting between the valves that eliminates the cracking issue that many people have run into. Our head will work for both the MXS and 6nz engines. 

For injectors, we like to use the 10R8502 injectors. We flow match the injectors giving you optimal performance and a smooth Idle. We typically have these injectors on the shelf. Call us and we can save you a lot over Caterpillar pricing. 


We do not recommend using an aftermarket program. We have seen countless issues on head gaskets that are directly caused by programs created by people that don’t really know what they are doing. We like to use the 6NZ 550 HP program. This has proven to be a great, reliable and powerful program. 

The 550 HP program does seem to build higher than desired EGTs. The best way to get rid of that heat is by installing a bigger turbocharger on the truck. We offer a new turbocharger that is perfect. It is reliable and builds awesome power but is not going to break the bank like a lot of the other unnecessarily expensive turbochargers. Another thing you can add to keep the EGTs down is a ceramic-coated aftermarket exhaust. We do not have one specific manifold to recommend for performance-related reasons, But we do thoroughly appreciate PAI’s Ceramic coated manifold as it seems to be a very quality product and does not break the bank. 

An added touch

Use the bigger 10R7155 camshaft for more reliability. Again, don’t go to Caterpillar to buy this camshaft. We at SRX can supply it to you at a fraction of the cost. 

In summary – a reliable powerhouse

With the bigger turbocharger, flow-matched injectors and the bigger camshaft we have seen many numbers in the 630 HP range.

If you are wanting to build this engine on your own we are here every step of the way to help! We can sell you all of the same parts we use in our own engines and save you thousands of dollars over going to Caterpillar. 

Always take into consideration the emissions laws and the states you are wanting to haul in. We always use an existing 6NZ engine to build from and would recommend you do the same. We have quite a few 6NZ engines left and would love to assist you in your core engine needs as well. 

Are you looking to buy a Caterpillar C15 like this?

We often have completely remanufactured and used Caterpillar C15 diesel engines in stock. An extensive and competitively-priced inventory of parts is on our shelves! Give our Sales or Parts Teams a call or visit our Contact Us page.