[Zach O.]

I tried to search and didn't find what I was looking for. Has anyone used the 7% lower rather than the usual 10%? No clearance issues kinda nice. Any input is appreciated.

6.2L HEMI Hellcat Overdriven Dampener - 7 Percent by MMX - MMX Modern Muscle Xtreme

 

[ScLeCo]

Nice. You'd only be loosing 1.5-2 psi vs the 10% and the ease of installation is a huge plus. BUT...Here's the thing. It's much easier and cheaper to just pin the stock crank pulley and get as much boost as your fueling and engine can handle by going with a smaller upper.
🤷‍♂️

 

[moparjim]

I guess this pulley is in response to the Incognito that came out Nov '19.
The difference is this is actually a harmonic balancer and not just a sleeve.
So basically getting a 10% lower and a belt plus the tuning.
The gains will be much more.
The cost difference will offset some of tuning costs.
The installation will be almost the same except for a little grinding.

I had tried the other sleeve. While a friend has had good results, my car did not like it at all.
So a tune is required anyways in my case.
So I have a 10% ATI to go on the car shortly.

 

[Himmelkat]

Want FREE horsepower? @hpindy occasionally has some 15-percent-slower accessory pullies to bolt to the front of an ATI damper, whether it be the 10 percent larger or the stock diameter main pulley on the damper. Function is not affected.