Exhaust help - Straight piping

[jaycheetwood]

I am looking for everyones thoughts on my idea for my exhaust..

i want to gut my post sensor cat so my 2nd cat or well my 4th cat i guess you could also say. ha.. i want to gut the cat and straight pipe it with no muffler. Does anyone know the gains it will give?

I live in an emission free county so im not so worried about the legalities.

Also my next thought was to gut the cat and run straight pipe into a flowmaster super 40 or super 44.. what does everyone think about this?

Any thoughts or ideas would be greatly appreciated in my quest for sound and performance.

 

[BlackBII]

Gains? Maybe none, except for more fines in breaking federal laws.

It will sound like crap also. If your looking for better sound, just put slowmaster on it and call it good.

Really tho, don't expect any gains from a gutted cat, if you go too far, you may even get reversion flow, causing a loss in power.

 

[jaycheetwood]

luckily being i live emission free federal laws for emissions are non existent....yet..


and well what about high flow cats?

 

[85_Ranger4x4]

luckily being i live emission free federal laws for emissions are non existent....yet..


and well what about high flow cats?

Federal is federal, it covers the whole country.

Your truck has high flow, honeycomb cats from the factory.

 

[jaycheetwood]

so dont mess with the cats at all and just run a flowmaster out?

 

[Shran]

In my experience you will gain a lot of noise by gutting the cat(s) or removing them completely. I'm not sure about newer vehicles but the cats from the 80's almost eliminated the need for a muffler, making it really hard to get decent sounding exhaust.

Performance wise it doesn't really matter. Unless you have a diesel engine. I believe there are new regulations concerning cats on diesels that came into effect recently.

Keep in mind that if you gut them your exhaust will smell much different as well.

 

[85_Ranger4x4]

In my experience you will gain a lot of noise by gutting the cat(s) or removing them completely. I'm not sure about newer vehicles but the cats from the 80's almost eliminated the need for a muffler, making it really hard to get decent sounding exhaust.

Around the mid to late 90's that style of cat died out.

 

[AngryLepercon]

I was helping out a friend wrench on his truck and her went out and bought like 50 foot of stainless tubing to make his exhaust when he got it done he had not cats no muffler and it was a straight pipe no bends. he went off the header went under everything and ran straight pipes. needless to say it did not last an hour when the truck would not run right because he had no back pressure.

 

[turbo cat]

just get a hooker max flow they sound better in my 02 and flow better than a dronemaster.