Six In A Row Makes Mopar Go: The GMET6 Is A 507hp Boosted Inliner That Will Send The Hemi Out To Pasture


Six In A Row Makes Mopar Go: The GMET6 Is A 507hp Boosted Inliner That Will Send The Hemi Out To Pasture

(By Tom Lohnes) – Ladies and gentleman, the Jeep Inline-6 has returned. After years of rumors, a confirmation on various Stellantis-related websites, and 6 model debuts that should’ve had it, it’s here. Meet the GMET6, an absolute unit of a boosted 6.

With two versions, the GMET6 is the replacement for the aging 5.7-liter and 6.4-liter Hemi V8s that are seen in some way or another across all American Stellantis companies. Replacing the 5.7 that has been out since 2003, the standard-output version of the GMET6 is a 3.0-liter, twin-turbocharged Inline-6 that delivers “more than” 400 horsepower and a whopping 450 lb-ft of torque. This engine is a DOHC design, with direct injection and a mild-hybrid battery pack between the engine and transmission that acts as a starter motor and low-speed power source. This engine will be seen in the Jeep Wrangler, Gladiator, Grand Cherokee, Grand Cherokee L, and Wagoneer models. It will also be seen in Dodge “R/T” products, and maybe even some Ram trucks. If there is a next-gen Chrysler 300, it will probably also use this engine with production starting next year. Remember, this is the “weak” version, let’s take a look at the strong one

The GMET6 H.O (for high output) has potential to be the next 2JZ. With beefed up internals and bigger turbos than the standard version, the H.O makes 507 horsepower and 575 lb-ft, making it the most powerful production Straight-6 to date, beating BMW’s S58 with 503 horsepower. That’s right folks, your Grand Wagoneer is going to be more powerful than a M3 Competition next year. This engine is meant to replace the mighty 392 Hemi, which will always hold a special place in all Mopar enthusiast’s hearts because of its ridiculous noise and tire-melting potential. But, this might sound even cooler, and it can take boost unlike the old 6.4.  This will power the next “Scat Pack” models, and will be the new base engine in the Jeep Grand Wagoneer next year. We may have a winner on our hands.

It is not often a brand like Stellantis comes out with an engine that has such huge potential. This seems like a very good engine stock, but tuners are essentially in heaven with a boosted 6-pot, and the thought of a 1000hp Jeep Grand Wagoneer is a pretty cool one. Hopefully it holds up.


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3 thoughts on “Six In A Row Makes Mopar Go: The GMET6 Is A 507hp Boosted Inliner That Will Send The Hemi Out To Pasture

  1. KCR

    Well, here we go again. Using a way too small engine to do a larger engine’s job. So we throw huge amounts of boost into it to make it act like a big engine. Diesels live this way for zillions of miles each day. However, there is oil on both sides of the piston. making them live forever. Ford has proved in the last few years this doesn’t work. They have big vehicles with boosted 4 cyl’s in them. And the engine is worn out at 70K miles. And let’s not forget, turbos will and do wear out. Last I knew, the Ford twin-turbo V-6s have a $7,000 price tag for replacing the turbos. And like most of these ridiculous vehicles nowadays. The most you can do to your vehicle at home is maybe an oil change and rotate the tires. I’m a Mopar guy big time. But this will be a mistake. However, they have had a huge problem with the gen 3 Hemis eating cams. So they came up with a new idea. I will wager after this mistake. Within 10 years. They will be selling all-electric vehicles as the normal units.

  2. Labweiler

    I’ve been staring at the pictures for five minutes and I’m trying to figure out where the actual engine is.

    All I see is a rat nest of tubes, wires and other BS which translates into huge bills at the dealer since any maintenance starts with digging through the rat nest to access the broken part.

    What an absolute mess.

  3. Matt Cramer

    Look closely at the cam ends and crank pulley – it’s hard to see the block and heads, but it looks like the design is a slant six. About 15 degrees to the right instead of 30, but still has a definite slant.

    My main worry is whether the coated aluminum for the cylinder bores is going to work well. The process they’re using has been out for about 14 years, though – at least they aren’t trying to be first with this process.

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