Wrecker
The Oil Geek
I have a K=47 and sucked the restrictive indicator down to the red after a prolonged tow at full throttle up a 6 percent grade for a mile and a half. The ATT was registering a whopping 23 psi boost for a sustained minute. I also should say that my filter is the large standard factory filter and it is clean. HUMMMMMM
Turbine Doc had the same problem, after installing the Amsoil Nanofiber replacement filter, no problem.