Procharged 2020 Jeep Grand Cherokee Trailhawk, 5.7 Hemi
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I installed a set of American Racing Headers (ARH), Long Tubes and High-Flo Catalytic Converters to my 2020 Jeep Grand Cherokee Trailhawk, 5.7 Hemi.
I read once that the reason the GC has less horsepower than their counter parts was due to the exhaust manifolds used.
For example, the 2020 comparison of the 5.7 Hemi’s HP/TQ:
Grand Cherokee – 360/390
Dodge Charger – 370/395
Dodge Challenger – 375/410
Ram 1500 – 395/410
I can’t speak for the others (listed above), but our “Log Style” exhaust manifolds are very restrictive, I almost feel sorry for the poor engine just trying to expel all that exhaust. lol
With the ProCharger adding more air and fuel, it only made sense for me to help it pass through with less restrictions.
I attached a few pictures of the oem manifold along with the headers that replaced them.
It took me two days.
1, because I took my time and played with other things along the way.
2, armor. I have a few CHIEF PRODUCTS – Lower Front Guard w/ACC Protection, Sump Protection Plate w/Access Panel, Transmission Protection Plate, oem Engine plate, and the oem Transfer Case plate, (and the front drive shaft) all must come off to gain access to the exhaust manifolds.
There is definitely a process, but it is doable as long as you don’t get into a rush. There are a lot of things that need to be moved out of the way first. Air Filter box (if you have one), PCM, Fuse box and their mounts, and the above mentioned, just to name a few.
Is it worth it? With an estimated 30 to 40 HP gains… I would say, yes. There are a few more things that I would like to do first, but a tune and dyno run are in my future, so we shall see.
It is definitely more responsive, and a little bit more aggressive sounding. It has a very nice exhaust note from inside the Jeep, and it wakes up when you ask it to. I did not notice any interior drone while driving, in the city or on the highway.
These are the ARH 1-3/4 headers, very well made and fit nicely.
The Long Tube Headers are a compliment to the Corsa Cat-back system that I already had.
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I read once that the reason the GC has less horsepower than their counter parts was due to the exhaust manifolds used.
For example, the 2020 comparison of the 5.7 Hemi’s HP/TQ:
Grand Cherokee – 360/390
Dodge Charger – 370/395
Dodge Challenger – 375/410
Ram 1500 – 395/410
I can’t speak for the others (listed above), but our “Log Style” exhaust manifolds are very restrictive, I almost feel sorry for the poor engine just trying to expel all that exhaust. lol
With the ProCharger adding more air and fuel, it only made sense for me to help it pass through with less restrictions.
I attached a few pictures of the oem manifold along with the headers that replaced them.
It took me two days.
1, because I took my time and played with other things along the way.
2, armor. I have a few CHIEF PRODUCTS – Lower Front Guard w/ACC Protection, Sump Protection Plate w/Access Panel, Transmission Protection Plate, oem Engine plate, and the oem Transfer Case plate, (and the front drive shaft) all must come off to gain access to the exhaust manifolds.
There is definitely a process, but it is doable as long as you don’t get into a rush. There are a lot of things that need to be moved out of the way first. Air Filter box (if you have one), PCM, Fuse box and their mounts, and the above mentioned, just to name a few.
Is it worth it? With an estimated 30 to 40 HP gains… I would say, yes. There are a few more things that I would like to do first, but a tune and dyno run are in my future, so we shall see.
It is definitely more responsive, and a little bit more aggressive sounding. It has a very nice exhaust note from inside the Jeep, and it wakes up when you ask it to. I did not notice any interior drone while driving, in the city or on the highway.
These are the ARH 1-3/4 headers, very well made and fit nicely.
The Long Tube Headers are a compliment to the Corsa Cat-back system that I already had.
