After reading an article in a trade journal claiming the diesel engine would never be successful on the road, Clessie Cummins, founder of Cummins Engine Co., decided to take that statement as a challenge. In a used Packard limousine with a Cummins engine swap, Clessie and his chief engineer departed Indianapolis for the 1930 Automobile Show in New York City. They faced hundreds of miles of rough roads and terrible winter weather but arrived on time and with a fuel cost of just $1.38, only to be barred from entering the show because Cummins hadnβt registered in advance.
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Page 4 - Josh Wayman
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Continue Reading »Determined as ever, Cummins rented space across the street from the Automobile Show to showcase his new engineβand it paid off. His engineβs reliability and comparatively low fuel consumption made it a star at the 1930 Automobile Show, despite not even technically being a part of the show. Before long, the robust and torquey appeal of his engine caught the attention of truck operators nationwide. The rest is history.Here
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For truck enthusiasts and professionals alike, ensuring continued performance is crucial. One of the most prominent threats to a truckβs performance is heatβespecially when it comes to the transmission. An overheating transmission can cause serious damage, particularly when the truck is working hard while towing or off-roading. Thatβs why weβve been hard at work developing our Transmission Cooler for the 2019+ Chevrolet Silverado and GMC Sierra 1500.
Mitch, our engineer, set out to design a transmission cooler that would outperform stock. He opted for a tube-and-fin core design, which is less prone to develop air pockets as fluid moves through the system and more resistant to pressure drops. Mitchβs direct-fit design was drastically larger than its stock counterpart, boasting these improvements over stock:
The stock transmission cooler next to a test-fitment Mishimoto prototype.Type of Increase Increase Percentage Core Volume 266% Frontal Area 83% Internal Tube Area 339% External Tube -
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With 475 horsepower and 1,050 ft-lbs routed through a 10-speed 10R140 TorqShift transmission, the 2020-2022 Ford 6.7L Powerstroke was designed for serious towing. With big power comes lots of heat, and this is especially true when hauling heavy loads or towing uphill. As impressive as this truck is, heat is the enemy of any transmission, and as temperatures rise, so do problems.
The stock transmission cooler does a decent job of cooling, but if youβre looking to push this truck to the limit, decent wonβt do. Thatβs why weβve been hard at work developing the Mishimoto Transmission Cooler for the 2020-2022 Ford 6.7L Powerstrokeβthe first of its kind on the market.Stock Evaluation

The stock transmission cooler uses a liquid-to-liquid design. This works by transferring heat from the transmission to the engine coolant. This style of transmission cooler is becoming more commonly equipped by OEMs due to their compact size, but there are pros and cons.
Typically, liquid-to-liquid transmission -
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As the Toyota GR Corolla enters its third model year, weβve been hard at work expanding our lineup of performance products for the rally-inspired machine. The 1.6 liter three-cylinder G16E-GTS engine is the highest power-per-liter output of any Toyota road car engine with each cylinder responsible for 100 horsepower, boasting a total of 300 horsepower out of a remarkably small engine. The engineers at Toyotaβs Gazoo Racing Division achieved this feat by pairing the G16E-GTS with a turbocharger capable of 26.3 psi of boost.
In the blog about our Performance Radiator for the GR Corolla we talked about how important cooling is for one of the most powerful three-cylinder engines in history. The same is true for the GR Corollaβs intercooler system. The turbocharger is a vital part of the GR Corollaβs performance, and when youβre driving the car how it's meant to be drivenβsetting lap times at the track, carving up and down mountain roads, or spirited cruising down your favorite backroadβthat
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Picture yourself on the shoulder of the highway. You noticed the gears slipping a few miles back but decided to ignore it because you were only a few miles from home. Those slipping gears turned into violent lurches, and before you knew it, your 2019+ RAM 6.7L Cummins was sporting a Christmas tree dashboard and that dreaded burnt smell. Your transmission is toast.
But it didnβt have to be this wayβif you had the Mishimoto Performance Transmission Cooler, youβd have made it home.

FIgure 1. A side-by-side comparison of the Mishimoto Transmission Cooler and stock. Our new transmission cooler for the 2019+ RAM 6.7L Cummins is a direct-fit application that offers improved cooling capabilities and seamless integration into your truckβs transmission system. Our coolerβs core is 64% thicker than stock and uses three additional rows of fins for peak efficiency. To maximize the cooling potential of the enlarged core, our engineers decided to use high-efficiency internal fins that add more cooling
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Every owner of a performance vehicle knows the importance of keeping their car running cool, but not everyone knows where to start when it comes to upgrading their cooling system. For owners of the 2024+ Ford Mustang looking to take the next step in performance and reliability for their carβs cooling system, itβs best to start with the basicsβthe coolant expansion tank.
The stock coolant expansion tank on the 2024+ Ford Mustang leaves a lot to be desired. The plastic construction isnβt just an eyesore, itβs not designed to stand the test of time. After repeated heat cycles the plastic yellows and becomes brittle, leading to a higher risk of cracking and coolant leakage. This risk only increases when the vehicle is driven hard, such as fast laps at the track or hard pulls on the dragstrip.

Figure 1. The stock coolant reservoir on the 2024 Ford Mustang. Thankfully, we have a solution for Mustang owners out there.
The direct-fit Mishimoto Coolant Expansion Tank for the 2024+ Ford Mustang features
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For truck owners who depend on their vehicle for work, reliability and performance are paramount. Whether your truck is a construction fleet vehicle or a dedicated tow rig, one of its greatest enemies is heat β especially when it comes to the transmission.
Transmissions can generate a lot of heat, especially when towing, driving in rough conditions, and off-roading. This becomes more of a problem when theyβre paired to a powerful engine, such as those used in GMT800 and GMT900 trucks, which is why weβve been hard at work developing our Performance Transmission Cooler for the 1999-2013 Chevy Silverado and GMC Sierra.
Using the same tried-and-true core design as our K2 and Duramax trans coolers, our transmission cooler for the 1993-2013 Chevy Silverado and GMC Sierra boasts a 521% increase in core volume and 278% increase in frontal area compared to stock. The stacked-plate core
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Following the immense success of the rally-inspired GR Yaris overseas, Toyotaβs Gazoo Racing division needed an offering for the North American market. After years of workβincluding delays brought on by Toyota CEO Akio Toyoda, who wasnβt initially satisfied with the prototypeβtheir result was the Toyota 2023 GR Corolla. Sharing the unique 1.6 liter three-cylinder G16E-GTS engine with the GR Yaris, the GR Corolla puts out an impressive 300 horsepower and 273lb-ft of torque.
So, what does having one of the most powerful three-cylinder engines in history mean? Well, it means youβre in for a lot of fun. But it also means when youβre driving hard, youβve got to keep that straight-three engine cool. Thatβs why weβve been hard at work developing the aluminum Performance Radiator for the 2023+ Toyota GR Corolla.

Fig. 1 Mishimoto engineers test-fitting our radiator prototype. Our engineer, Mitch, started off by ditching the stock radiatorβs plastic end tanks for a more reliable aluminum construction.
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In 2006, BMW introduced a new mass-produced turbocharged engine for the first time in twenty yearsβthe N54. Three years later, they released the N55 as a successor to the N54, which offered fuel efficiency and reliability improvements over its predecessor. While the two engines have their differences, at their core theyβre both three-liter, turbocharged straight-six engines, both put out over 300 horsepower, and both were used for as the powerplant for numerous BMW models. But they have something else in commonβa weak point.

Fig 1. A 2017 BMW M2 in our garage for test fitment. Stock Evaluation
Hop onto any BMW forum and search for either engine with the words βcharge pipeβ. It wonβt be long before you find post after post about the charge pipes on these engines cracking and failing, even on stock tunes. The OEM charge pipes used on the N54 and N55 engines are plastic, which becomes brittle and weak after time and repeated heat cycles. Once the charge pipe cracks, the engine begins drawing
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When Nissan planted the powerful VR30DDTT 3L V6 engine with twin turbochargers in the Nissan Z, there wasnβt much room left in the engine bay. The cramped area didnβt allow enough space to accommodate the traditional top-and-bottom-split airbox design, so they created a unique single-piece airbox with vertically inserted panel filters that maximized flow while minimizing size.
As enthusiasts and engineers, we tipped our hats to appreciate the work Nissan did with this design. But we couldnβt help but ask ourselvesβhow can we make it even better?
Design Process
Our engineer, Ye, set out to design a direct-fit airbox for the 2023+ Nissan Z with these goals:
β’Β Achieve better airflow than stock
β’ Ensure a direct-fit, bolt-on installation
β’ Create a design that lets the user alternate between a sealed or open airbox setup
β’ Deliver a high-quality intake tone
β’ Maintain a safe air-to-fuel ratio and ability to run on a stock tuneShe began by inspecting and removing the stock airboxes to determine
