Before modification vehicle was very sluggish and missing andshaky while idling exhaust smelly. After mod accelerates very quickly throttle response on topo of pedal no more shaking or mising runs very smooth and starts much quicker.

1998 Ford 150 4x4 4.6 engine gains 25% improvement in gas mileage even when pulling trailer, customer very pleased

how did you get to the pcv valve?whats the best size bit for this?

The large bit I use on 9o% of the mods Im sure Aron does too. The pcc always go to the vac source dont plug the line at the valve. And very important always make sure it doesn`t have 2 pcv`s as some engines do.