My customers are absolutely thrilled with how their truck runs, before it was a total dog and barely made any power on the SOTF pack they bought from another company.
NOW it runs better than ever, shifts properly, does not lug between gears and can spin 38x15.50s like they’re stock size tires

MM3 Power Tuner - Device Only - Blank

Typical review. I was with another tuner that never could get it dialed in. Reading online and found catuning. With all the positive reviews I figured I would give it a shot. Filled out all the info with a list of my mods, paid my money, got a file 10 minutes later. Loaded it up and I got a couple codes. Come to find out the old tuning company had turned off all error codes. Catuning helped me fix the issue that was wrong with my truck when they didn’t need to. When I got to put some miles on the truck the power was night and day. No black smoke, cleeeeannn tune. The shifting is so smooth and effortless. I got the partial lock with oem shifts, butter. I wish I would have found these guys sooner. Very rare to find a company that actually writes their tunes. No reseller stuff. This company is legit. Throw your money at them. Thank you catuning.

Every thing went smooth and perfect trucks run perfect

The truck is so much better now. Power is great on each level and the transmission tuning is sooo much better! My tires however, are not amused!

Absolutely love the delete kit. Both the 5” muffler exhaust and my buddy’s 5” straight pipe. No complaints easy break in. Stock tranny on 195k miles shift smooth. Highly recommend

Tune worked great, really noticed the power added and responsiveness!

These guys are awesome. I've had two previous tuners, and with both, I had issues with cold starting and the transmission shifting oddly. I emailed Ca before purchasing and asked a few questions to be reassured that I wasn't going to waste my money on another company with poor tunes. These guys are the best; the first test drive I took with the truck, I could already tell the transmission tuning was on point—no more lugging in 6th gear like my previous tuner. The truck doesn't constantly emit black smoke from the tailpipe on cold start-up now. The 200 hp tune is absolutely amazing and surpasses my other tuners' tunes. I 100% recommend them; they hit my tune spot on the first try. Thanks again, guys, you're the best!

New custom tune is by far more than expected! Awesome people! I had minor questions issues and glitches along the way, which is expected and their customer service is superb! Highly recommend Stephane of CA Tuning.

I absolutely do not regret ordering my complete downpipe back 5” exhaust w/ muffler. Compliments the truck very well and sounds awesome with no cab drone or excessive cruising noise. Also fits onto factory hangers, easy to install and is very stiff with no rattle. I’ll tell anybody in the market to go with this system

68rfe has never shifted better! Holds the powerband perfectly while towing. Consistent firm shifts that were missing with the previous tuner I was using. High recommend!

Responsive, very helpful, a pleasure to deal with, truck runs great

Great job. Great team, they were very helpful.

Seems like they know what they’re doing as far as G56 swap in a 2013 truck goes. All auto related stuff is gone, PRND, trans temp, traction control tow haul disabled etc. alfaobd recognizes it as a manual truck. Fuel mileage has improved and the puff of white smoke on startup that I had with my old tuning is gone. The tunes themselves are great. Lots of power and very little smoke on the mid settings. The only thing I wish they could do is enable manual high idle with the cruise control settings, but they said they are unable to do it.

Hands down the best tuning for Cummins. Did the ecm swap. Great customer service