Polishing intake manifold - a real way to boost performance
If you've ever peeked inside a stock engine bay and noticed the grainy, sand-like texture on the engine parts, you've probably wondered if polishing intake manifold surfaces actually makes a difference. It's one of those classic garage projects that falls somewhere between "strictly for looks" and "hidden horsepower." Most car enthusiasts eventually find themselves staring at a cast aluminum intake, thinking about how much better air would flow if those internal walls were as smooth as glass. ...