Grand Cherokee SRT brakes would be way cool. 6 piston calipers on 15" rotors up front and 4 piston calipers on 13.8" rotors in the rear. Now that would stop you in a hurry.
BUT, I don't know if it would work off the shelf. The wheel bolt pattern is the same, so no need to change hubs. The rotors should fit. The spindles (knuckles) however, are very different between the 2 models.
Unlike our vehicles with floating calipers, the SRT calipers bolt right to the spindles (no brackets required). Since the calipers have multiple pistons on both sides, they do not need to float, so can certainly be bolted in place of where the slider bracket would go. The question is, do the the bolt holes line up? If not, It's certainly possible to have some custom brackets machined. I compared the part numbers for the brackets between our Journeys and the Grand Cherokees and they do not match. that doesn't mean the bolt holes are different though. Even if it does fit, it will NOT be cheap. The calipers are around $300 each. OEM rotors are around $200 each. Total parts cost to do the upgrade on the front alone (if it fits) is over $1100. If machined brackets are required, add another couple hundred.
Here is a breakdown of the part numbers for the front:
Left Caliper - 68146611AA - $291
Right Caliper - 68146610AA - $300
Rotors - 05181513AB - $204 x 2 - $408
Pads - 68144427AA - $105
Shims - 68144779AA - $32
The rears are ever so slightly cheaper by about $10 as the rotors are a bit smaller.
So around $2200 for a complete SRT Brembo brake upgrade. On the plus side, brake pad replacement would be super simple.
Here is a picture to drool over:
I did some searching. If anyone is serious about trying the Brembo brake upgrade, it can be done for half the price for all 4 corners with used calipers and aftermarket (powerstop) pads & rotors from the previous generation Grand Cherokee SRT-8.
The Powerstop kit is K2867 and sells for around $400 + shipping
A set of used calipers from a 2006 (fits 2006-2010) is around $650 on E-bay:
Canada: http://www.ebay.com/itm/360923345717
US: http://www.ebay.com/itm/271471597911
I have no idea if it will work or not, just throwing out what i found.
