🔥 [MOTORS] 1989 GMC G2500 383 REV SOUND Vandura Heders It was amazing to change 😲

1989 I added Heders to GMC VANDULLA! With sound
The growth of high rotation has increased dramatically!
Mounting → REV sound → is a video of the running!
From the mid-range to the high-range, we were able to increase the amount of injector fuel by about 8%.
I was able to feel the POWER up in terms of experience and setting.