17-21 GM Duramax L5P HP Tuners New GM Unlocked T87A TCM*Please check with us to make sure this is in stock, due to high demand they come and go in stock often* You can now purchase New GM T87A TCMs for your 2017+ GM vehicle equipped with the 10 Speed and 8 Speed transmissions directly from HP Tuners that are already unlocked and ready for tuning. New GM Unlocked T87A TCMs You can now purchase New GM T87A TCMs for your 2017+ GM vehicle equipped with the 10 Speed and 8 Speed transmissions directly from HP

** 2-3 Week Build Time Normally**

It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition powerplants

dependable seal to help to keep the truck bed dry

even in the most demanding conditions

installation-instructions_76254-01A

SW # 8 : 170 Hp increase

-includes all hardware and gaskets needed

We even have install videos for many popular applications below

O-rings for every V-band or bolt together connection

Kit includes

Also included in this exhaust system is a massive 6" diameter

5 it was designed to handle mild/moderate fueling upgrades and comes equipped with an extended tip 64