Worked great!

These guys are the best! They answer the phone, answer questions, help with the install oh and the tunes are perfect!

Questions were answered quickly and parts showed up as they should quickly. Had a fitment issue with exhaust and customer service and manufacturer were great in getting everything straightened out. Truck runs and sounds great. I would recommend to anyone.

My vehicle runs better than it ever did

Amazing quality and awesome service. Love these guys!

The truck runs amazing. I am thoroughly impressed with how fast and responsive the company is

This truck runs amazing. Will definitely be the only tunes I use for the L5P

As always these guys helped me roll another highly satisfied customer out the door. Keep up the great work

AutoCal V3 is great software, and the module is relatively easy to understand and use to complete the necessary tasks. The Tune Supply Shop is vary knowledgeable and easy to work with if requiring any type of assistance. The technical support staff is very responsive when dealing with issues. I am very pleased and would highly recommend this product and the Tune Supply Shop support

The 05 Duramax transmission has never been smoother. Thanks Tune Supply Shop!

Great tunes! My 05 Duramax is a totally different truck now. Customer service was great! I had questions and small problems along the way because of my lack of knowledge with tuning and everything was answered and corrected quickly. Thanks Tune Supply Shop, you are top notch!

Appreciate the fast customer service

EFILive Single 2019-2021 6.7L CMF Cummins Tune

Great customer service answered all my questions Tune’s work great on my truck and everything arrived to me super fast couldn’t ask for better service

Great tunes. Send the guys exactly what I had they were able to hook me up with some great tunes and multi stage switch. I was extremely surprised how well their tuning is. Went from a smarty jr and boy it opened my truck right up. Time will tell! Great tech support as well for downloading everything.