Will these give you more power on a stock exhuast then headers runing into a y pipe and muffler?

http://www.dmhperformance.com/

 

Are you asking if a cutout is better then headers?

If so, no, headers will make more power. Now will a cutout make more hp then the same setup without it, in most cases yes.

For example:
If you have a completly stock exhaust, you will make more power adding just a cutout.

If you have just a aftermarket muffler, you will probably make more power with just a cutout.

If you have headers and mufflers, you will probably make more power with adding a cutout.

But if you are choosing between headers (esp. long tubes) and a cutout, the headers will be the bigger gain.

-James

 

Thanks, thats exactly what I wanted to know.

 

I have a DMH 3" E cutout and I cant speak for power, but I ran it closed for a tank of gas and noticed a significant drop in mileage (about 35 miles per tankful). So I run it open most of the time. (plus it sounds faster)

 

Lol. Must sound real nice when there’re open. I trust it’s not all bark and no bite! Hahahahah!

 

lt1's generally like backpressure so they produce more hp/tq without a cutout.

Been dyno proven.

 

Now that I didn’t know, so let me get this straight, headers & cut outs reduce backpressure so they are not as effective on LT1's as on other cars? And a stock exhaust on an LT1 is better then one with headers on it because it produces more back pressure.

 

I would like to see that proof, most people I know of gain at least 5 rwhp adding a cut out.

 

yes, i too find that hard to believe especially over the stock exhaust system.