I'm looking for some shops in the Chicagoland, IL area. I actually live in Joliet, IL which is a part of the Southwest suburbs of Chicago but I will drive a distance for quality work, good customer service, and decent prices(in that order). I am mainly looking to get an ARB Rear Air Differential Locker installed on my 2008 Toyota 4Runner, and possibly get the front one installed at a later date.

Here is the list of places I have found so far and wanted to see if anybody can tell me if they have had any experience with any of them or if anybody can name a few that aren't on the list and tell me about them please:

Attitude Performance
2349 E. Oakton St.
Arlington Heights, IL 60005
(847) 593-0505

Performance Unlimited
5415 Austin Ct.
Ringwood, IL 60072
(815) 728-0343

Suburban Driveline, Inc.
747 West North Ave.
Villa Park, IL 60181
Toll Free: (855) 429-6790
Phone: (630) 941-7101

Maximum Automotive
1580 West Ogden Ave. Unit 560
Naperville, IL 60540
(630) 357-5525

Alpha Auto Repair, LLC.
13604 S. Cicero Ave.
Crestwood, IL 60445
(708) 597-2700 or (708) 377-4335

Dominant Motorsports
12719 Old Plank Dr.
New Lenox, Illinois 60451
(815) 485-1328

Street Style, Inc.
870 South Randall Rd. Suite B
St. Charles, IL 60174
(630) 377-9779