Its not like the 4.0l wouldn't be the same. Actually, a little worse...

 

Ditch the snorkel. You can easily get a 10-15hp DROP from installing one, mostly noticable in the top end range.

Dropping to 35's would give you a noticable power gain, and you would only lose 3/4-1" of clearance depending on which tires you have. Do you really NEED 37's? Where do you wheel?

But other than that, trade it in for a 2dr, go with a manual, slap on a super charger, or swap in a Hemi. There is a bit of a price difference between a few of those

 

Most do to the long length of the intake. As an tube gets longer, the air resistance increases. To counter act this, it needs to get larger to allow for lower resistance. Most of the snorkels I have seen are not nearly large enough, and some actually get quite small in the corner areas.

In racing, for the best HP, you make that intake as short as possible. Although a slightly longer intake can give better torque by keeping air velocities up. There is a limit to how long you want it.

 

The HP number depends on a ton of factors. So you may lose more or less depending on engine size, stock output, and the size/length of the snorkel.

And yeah, ultimately the individual runner length has a larger effect on HP/Torque than the combined intake length.

 

Are you sure you have the Flashpaq tune set up properly? Did you recalibrate the speedo and check it after? Somethin' don't sound right.

 

I would rather have more clearance underneath than tear something up. When I had the stock rubi tires on the first thing that broke off was the stock transmission skid plate. So the wife said "FIX IT" I had to listen to her

 

Lots of good info. Thanks everyone. I appreciate it.