Stopped at a car show tonight.

Once had a gentlemen and his son explain to me that my car would be considerably quicker with a different air cleaner. The 4" K&N was too big, a 2" would be more aerodynamic and thus create better air flow into my engine.
My brother-in-law and I just nodded and thanked him for the tip.

Later, saw him drive away in a pre-80 Datsun.

Everyone has a right to an opinion.