K&N Vs Foam, Borla exahust vs stock. Either of these worth the Money?

[ZForceRacing01]

Keep in mind I race asphalt. Has anyone looked at a dyno comparison for these two item?

I have the foam air cleaner and I think it is time for a new one. The Borla exhuast will be a winter upgrade if its worth my time.

[knoxracing]

The foam air cleaners are fine, the only problem is that they retain fuel if you have an issue. A misfire can lead to a carb. fire, we have seen this but it is rare. The Borla exhaust is not a big deal as they are all produced over seas now.

[legends13]

I have always heard the same thing about the filters, but The only fire I have ever had was with k&n filters. I have run foam filters for years and never had an issue.

[s10custom]

I was told that the foam filters are little better for low RPM/torque situation but even out at top speed. also, was told that the stock pipes with the Borla muffler was the way to go.

Robert

[racerrad8]

Foam is better hands down. The fuel mist from the camshaft timing over lap flushes the oil from the single layer filter media of K&N & similar filters which makes them basically useless.

The RPM dual foam filters are even better then the 600 filters as they are only a single foam element.

Here is a set of oval track carbs I rebuilt last week and he swore by the K&N filters. After I showed him his carbs, he is now using the RPM dual pod filters.







Randy - RPM

[ZForceRacing01]

Thanks for the info Randy.