Mine works sweet. The engine sounds like a V8 should under throttle. Just like any vacuum cleaner will demonstrate, does anyone still have one? When the intake hole is less restricted, the motor runs freely. Air In - Air Out Grasshopper!
:banana::banana: Part it out! You are on the left coast, is the 4RNR also?
:banana::banana::banana: FaceBook Marketplace and have your buddy do some research.
I'll buy your buddy's back bumper if it's solid. ;)