XX-Tuning and Dyno - GM Custom Tuning in Connecticut, Massuchusets, New York GM Custom Dyno tuning by the best in Connecticut

XX Tuning can custom tune your car according to your modifications. Our custom Custom Tuning will not only give you more power, but it will take the place of multiple products. The tune will be custom calibrated to your vehicle modifications, no canned tuning here! No need for a timing adjuster or MIL eliminators (for catless or highflow cats), this can all be taken care of in your custom tune. XX uses the latest HP Tuners tuning software to calibrate any GM vehicle from 99-07. Your custom tune is created by a tuner with over 7 years of tuning experience, is EFI Certified, and has a proven track record in the GM and domestic community, can your tuner say that?

Please Check out our Application Guide HERE

Most GM Gen IV Cars and Trucks 2005-2007

Includes 4 Credits with 1 Custom Tune on our MD Dyno

$550

"Most" GM Gen III Cars and Trucks 1998-2004

Includes 2 Credits with 1 Custom Tune on our MD Dyno

$475

"Most" GM Duramax Diesels

Includes 2 Credits with Custom Road Tuning

$475

Includes 2 Credits with Standard Flash

$375

Additional Pricing

Individual Credit Pricing (For Live Tuning or other features)

$85

Complete Custom Tune with Cable/MDVI Interface/4 Credits

$1,100

MDVI Interface, VCM Suite with 8 credits (No Tune)

$750

Additional tune for Nitrous/Race Fuel/Boost

$250

Labor Rates

Install bung for wideband O2sensor

$75

Code Scan / Diagnosis

$30

Data logging and custom tuning current HPT customers

$150/hr.

Code Scan / Diagnosis

$30

Package Pricing Available, Please Contact Us