I have seen a few running the RBP exhaust (my old neighbor was one) and it didn't sound any different than any of the other exhausts to me. Sounded pretty much stock maybe a little louder.

 

FYI-
Not to rain on the turbo noise parade, but removing the cat is a felony.
No kidding...a real, live felony.

Also, why make the air any worse than it already is? I know I'm a voice in the wilderness on this topic, but there is another guy in this forum that got turned in by his local oil change shop, and he was arrested. No one believed him, so he posted links to see his arrest papers. It cost him thousands to get past it.

Something to consider.

 

I'd like to see those papers. I have been asking these Cat delete questions for years.

 

Just go my new exhaust on and I love it so far (only driven 4 miles or so, but love it). I went with a RBP no cat, turbo back, 4". The sound isn't too loud but you can really tell a difference at the higher RPM's.

 

i would also like to see the papers, if it is a felony to remove your cat, then wouldnt it be illegal to sell performance exhausts that have no cat? I work with a guy who bought a brand new truck that came without a cat.... Can you explain that?

 

Question: How can "they" sell cat bypass pipes?
Answer: It's illegal, unless they mark the package "for offroad use only"..this is how Harley can sell illegally noisy pipes through their dealers.

I pasted a few things below....if you search Google you can find out tons on this topic. I make a living keeping a really big company in compliance with environmental laws, trust me, the only thing more fun than the EPA is the IRS. You don't want to go there.

Besides, why make the air dirtier? People say if I do it it won't matter, which reminds me of an old saying about personal responsibility....

"No single raindrop believes it is to blame for the flood"

Do everyone a favor and keep your trucks legal and polluting as little as possible!!

Here's an article from the paper.....
BOSTON - The U.S. Environmental Protection Agency is seeking penalties of $1,500 from each of five New England auto repair businesses for violations of the federal Clean Air Act. In each of the cases cited by the agency today, the auto repairs shops tampered with anti-pollution equipment on cars while doing repairs, allowing for increased emissions of harmful tailpipe pollutants. EPA began this investigation in response to numerous complaints received from vehicle owners whose vehicles failed emission tests after having had repairs done to the car.


EPA cited two Malden, Massachusetts repair shops: In Motion Auto and Auto Engineering; Geyer's Garage in Braintree, Massachusetts; Hebert's Used Auto Parts in Goffstown, New Hampshire; and Sports 'n Imports in North Branford, Connecticut for removing or disabling emission control devices and systems in violation of federal law.



"Every car on the road needs to operate at peak efficiency if we are to breathe clean air," said EPA's New England Administrator John P. DeVillars. "Tampering with pollution control equipment robs us all of the right to a healthy environment." DeVillars added that if mechanics from these repair shops fix the anti-pollution equipment at no cost to the customer, the EPA would be willing to reduce the penalties pending against them.

The Clean Air Act prohibits both individuals and auto repair businesses from removing or incapacitating an emission control device such as: catalytic converters, air pumps exhaust gas recirculation valves. Cars made in or imported into the U.S. have a certified emission control system configuration approved by the EPA. Changes in configuration may increase tailpipe emissions significantly.

Here's the law, found at Title II of the Clean Air Act, Section 203:

Sec. 203. (a) The following acts and the causing thereof are
prohibited-
.....
(3)(A) for any person to remove or render inoperative any
device or element of design installed on or in a motor
vehicle or motor vehicle engine in compliance with regula-
tions under this title prior to its sale and delivery to the
ultimate purchaser, or for any person knowingly to remove or
render inoperative any such device or element of design
after such sale and delivery to the ultimate purchaser; or
(B) for any person to manufacture or sell, or offer to
sell, or install, any part or component intended for use
with, or as part of, any motor vehicle or motor vehicle
engine, where a principal effect of the part or component is
to bypass, defeat, or render inoperative any device or
element of design installed on or in a motor vehicle or
motor vehicle engine in compliance with regulations under
this title, and where the person knows or should know that
such part or component is being offered for sale or
installed for such use or put to such use;....

 

not trying to throw wood on a fire here, but if you are so worried abot pollution why do you drive a diesel or do you not drive a diesel but still post?

 

Diesels emit significantly less pollution than gas engines in some categories (like CO), but more in others. (like particulates and NOx)

I have an 05 F250 6.0, but it is important to note that what I drive doesn't change the facts of what I am saying. If you defeat pollution control devices on your car or truck, you are breaking the law and increasing pollution.

Apparently, not everyone is aware of this. So, if you take off your cat to get more turbo whine and then the unlikely happens and you get caught, at least you've been warned.

 

Hey speaking of Cat Delete pipes, I just installed my MBRP turbo back w/ cat delete. The hanger on the cat delete pipe is sitting too close to the subframe, and at times hitting it. Has any chopped a piece of the hanger off? I have aligned and realigned a few times no luck.

 

Tampering with emissions control devices is a federal crime.
This is enforced in various ways depending on the state you live in. This is because the USEPA grants most states authority to administer Clean Air Act rules.

In some states it is a felony, in others a misdemeanor, just like altering the odometer is a felony or a misdemeanor, depending on jurisdiction.

I have never heard of "dispenser".

 

OK guys, settle down.

No need to fuss over whether cat removal is a felony or misdemeanor, or simply an infraction or other class of illegal act at the state level.

Tampering with an emissions control device is against the law. You'll probably find that written down somewhere in the owners manual and under the hood.

And this is true for the cat, EGR, and any other device that is part of the emissions control system.

It's been that way for years and I don't think that it is jaybread's burden of proof to show all that this is true.

Do your own legal research and then remove your cat, or not, and then you can better deal with any consequences down the road knowing full well what you're in for if caught.

In any case, please keep it civil here.

Daryl

 

Maybe it would be a good idea to just close this thread out. Seems like we hit a sore spot with one of the local tree huggers. Hopefully one of the administrators can close this to keep the frustratios down.

 

Rwalker,

The 6.0 l diesel is classified as a ULEV, an ultra-low emissions vehicle.

While our diesels do emit more particulates and somewhat higher NO2 levels than a new gas motor, studies have shown that after a couple years of driving, the NO2 levels on a gas powered car are right up there with the diesel.

The beloved EGR valve is an attempt at keeping NO2 levels in check.

Diesel fuel itself has more energy per gallon than gasoline and that's one of the reasons why the fuel economy of diesels is better than gas motors.

The diesel burns less fuel for distance traveled (for the same class/size of vehicle) than a gas motor, and burns it more cleanly for the most part. So the diesel is actually less polluting.

 

I'm leaving the thread open for now because it is about cat deletes kits, and not specifically about their legality, and there was some helpful information being passed along.

A warning has been made regarding the legality of cat deletes, and everyone can take that bit of info and do what it with they please. Ignore it, reasearch it further on your own, whatever, and then make the decision to go ahead and remove the cat or not.

In any case, any non-civil posts will be removed.

Thanks for your cooperation,

Daryl

 

I did my own exhaust system for very little money and it looks/sounds/performs great. NAPA sells 3.5” exhaust tubing by the foot. I don’t remember exactly how much I used because I did this about a year and a half ago. I simply (carefully) took a saws-all and cut the 3.5” downpipe about 1.5” upstream of the cat. I removed the entire exhaust system past this cut. Using a 3.5” exhaust tubing coupler (because I don’t weld very well) I connected the new straight tubing to the coupler. After some measuring I figured out where I needed to put a 45 degree cut in the pipe in order to reweld it together and have it exit in front of the rear wheel like short-duals do. I took it all back off the truck and welded it together with a 5” chrome chisel tip on the end. I bent 3/8” rod and welded new hangers onto the pipe to fit my old exhaust hangers. (I can weld something I can turn around).

The price far outweighs the fact that it isn’t 4” material but with no artificial restrictions I doubt there’s much performance difference between the 4” systems and mine. True it isn’t stainless steel but the part that shows is shiny.

The truck sounds like the Bat-mobile. The turbo whine is very loud but the rumble isn’t. A straight-pipe Dodge makes more rumble noise than my truck. It has a growl during acceleration but goes almost totally away once I maintain a constant speed (remove most of the engine load). EGT’s dropped some and performance seems a lot better. I didn’t have any hard numbers to make any comparisons but the fun-factor definitely increased a lot. I kept the old exhaust system and if I sell the truck I’ll plug it into the 3.5” coupler just before the cat and I’ll be done.

The only negative is my right rear tire and wheel get a lot of soot on them but if I keep the truck reasonably clean it isn’t noticeable. If I let it go without a bath for a long time though, the tire/wheel go almost black. They clean just fine though with no permanent discoloring of the factory aluminum wheel.