Currently 2hrs on the engine and almost 1 full tank thru it. I added the sikk toys pipe and chrome fan cover with rare engine trix air scoop! Looks sweet it runs much better throttle response is crazy and all around more power thru the entire RPM range this pipe is essentially and engine trix made by sikk toys products, it hits the same way its got 3 stages of powerband and if tuned right u can even hit a 4th at high RPM its a great pipe for power across the whole rpm range. I also have just the bigger spacer on the manifold and loving the way the power hits so far.