Holley Releases New Gen III HEMI Swap Manifolds, Jeep Exhaust and Jeep 392 Tuning


Holley has recently released a few new products that might make your Jeep a little more fun to drive and that Gen III HEMI swap a little easier. Flowmaster released two new exhaust systems for the 2011-2021 Grand Cherokee, DiabloSport now supports 2022 Jeep Wrangler 392 and Hooker BlackHeart released Gen III HEMI swap manifolds. It was a good day for Mopar enthusiasts. 

The new Flowmaster Force II stainless cat-back exhaust systems are now available for both the 3.6L and the 5.7L 2011-2021 Jeep Grand Cherokee. The Force II exhaust systems uses a Super 50 muffler for a mild sound and increased performance. The tuned resonators keep drone and interior noise low so you can still enjoy a comfortable ride without robbing performance. 

Grand Cherokee owners could see up to an 11 horsepower and 15 lb-ft of torque gain at the rear wheels for both the 3.6L and 5.7L engines. The larger 4” polished tip is the perfect touch and what most people will be seeing. The kit is a direct replacement and includes all necessary hardware for installation. 

Speaking of performance and Jeeps, the new 2022 Jeep Wrangler Rubicon 392 is now supported by DiabloSport. If you are looking to maximize the performance of your 392 HEMI, DiablSport knows what to do. The 392 can be maxed out with a 93 octane tune and make an additional 14 horsepower and 16 lb-ft of torque. 

DiabloSport offers tuning through either the inTune i3 and the Trinity 2 devices. All 392 models require the PCM to be unlocked and a bypass module for tuning. Both of the tuning options include a PCM swap and bypass module for seamless solution for customizing and tuning your Jeep Wrangler Rubicon 392. 

Lastly, and what many of you have wanted or needed, is a budget freindly high clearance solution for exhaust manifolds for your Gen III HEMI swap project. For a while trying to reuse stock HEMI manifolds was about the only budget option out there. There are a few header options but also come with hefty price tags. Now, Hooker BlackHeart has a couple options of a Gen III HEMI Swap Exhaust Manifolds. 

The manifolds have been tested and fit several platforms including 1987-2004 Dakota 2WD, 1972-1993 D100/D150 2WD, 1966-1972 B-body (with manual steering box), and 1970-1974 E-body (with manual steering box) when using the Holley swap system components. They may be a great option for many other applications that have yet to be confirmed and they will not break the bank.

The exhaust manifolds are cast from hi-silcon-moly ductile iron and feature 2.5-inch 2-bolt connectors. The swap exhaust manifolds are offered in natural cast, silver ceramic and black ceramic finishes. Installation hardware is included and ready to bolt on. We think these are a huge win for Mopar enthusiasts looking to do a Gen III HEMI swap. With a starting price of only $299, this really helps lower the cost of a Gen III HEMI swap. We will be curious how many pairs of these we see at this years Holley MoParty.  

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Gavin Wollenburg

Gavin grew up around Mopars in his lakeside home in Ohio, his father showing him nearly everything he needed to know about haulin' some serious rear in his '72 Dart Swinger. Since then, he's made his little A-Body a serious autocross contender and regularly shows the modern boys how an old Dart does it!

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