jeep_94_xj
NAXJA Forum User
- Location
- United States
okay, i have a 1994 cherokee sport, i am wanting to straight pipe it after the cat, so i know i am not breakingany catalytic converter laws, but is it legal to not use a muffler?
-
Welcome to the new NAXJA Forum! If your password does not work, please use "Forgot your password?" link on the log-in page. Please feel free to reach out to [email protected] if we can provide any assistance.
Straight Pipe Laws
- Thread starter jeep_94_xj
- Start date
kidarkitect
NAXJA Forum User
- Location
- Salt Lake City, Utah United States
depends on where you are. many places have laws regarding decibel levels.
Boveevil
NAXJA Forum User
- Location
- Gulf Breeze, FL
Should be able to do a google search for a state statue as far as exhaust regulations.
srmitchell
NAXJA Forum User
- Location
- Mckinleyville (Humboldt) CA
Im not sure, but I felt like I lost some torque when I didnt have a muffler (for a week.)
I'd recommend finding a nice high flow muffler. It's up to you.
I'd recommend finding a nice high flow muffler. It's up to you.
sam24th
NAXJA Forum User
- Location
- charlotte NC
I ran straight pipes for about a week until I could install my magnaflow. It was kinda cool at first but got old, real quick. I didnt notice any power gains or loss. Most states have laws regarding the sound leel your car can emit, while some don't. I think in SC theres no laws regarding mufflers. Its probably best to check with your state's DMV laws.
DeftwillP
NAXJA Forum User
- Location
- Round Rock TX
If you go offroad, most places require a muffler as a spark arrestor.
Tapatalky
Tapatalky
WB9YZU
NAXJA Forum User
- Location
- Madison, WI
Fixed it for you
This really isn't OEM Tech. Or Tech at all for that matter. If you want to make your XJ sound like a farm tractor, go right ahead. Check with your local DMV or LEO to see if it's something that they allow in your State/Town. Some towns have stricter enforcement than the State. X2 on the Muffler in the Forest. USFS policy REQUIRES an OEM Style muffler to be installed on any vehicle traveling though a US Forest to catch sparks and prevent forest fires.
Last edited:
CodyJames
NAXJA Forum User
- Location
- Olathe, KS
I live in Kansas City Area and never have had a problem with the Cops. I have my muffler cut. But it is a 2001 so it does have two pre cats and one final cat. I do not know how a pre-pre cat cherokee sounds like straight piped. Mine is still pretty quiet from the outside. Sounds unique
but a muffler does not do anything for emmisions its all in the cat.
================================================
JUST to be real picky here.
NOT TRUE.
The muf generates back pressure witch is needed to help warm the cat and in the given time for warmup. For OB1 3 min for OB2 90 seconds.
Most states don't care about warmup time or the muf as part of the emission. A few do so it's best to check.
================================================
JUST to be real picky here.
NOT TRUE.
The muf generates back pressure witch is needed to help warm the cat and in the given time for warmup. For OB1 3 min for OB2 90 seconds.
Most states don't care about warmup time or the muf as part of the emission. A few do so it's best to check.
- Location
- WA state
Go with a magnaflow size and length is your choice.
ParadiseXJ
NAXJA Forum User
- Location
- Paradise, CA 95969
Why would you want to??? Are you 16? 17? Mid-life crisis?
...are there alot of National Forests, or forests at all in that region??
You can cut your fenders, Hack the back end off, lift it 12", put 10-12 500W lights on it, but really?? It won't make your engine any more powerful, it won't increase your mileage, it won't do a single thing except make your Jeep sound like crap.
It is, however, a free country...do what you like.
joe_peters
NAXJA Forum User
- Location
- Grants Pass, OryGun
If you reduce the exhaust system back pressure too far it will effect how the engine runs.
These aren't dragsters designed from the ground up to run without back pressure.
However, you could remove the muffler and monkey-fist a straight section of pipe in there just to see what it does--worst case would be a ticket or you could set some grass on fire which would be really bad and likely get you some quality time with Bubba in the showers.
Seriously, Google "exhaust scavenging", lots of information on it.
These aren't dragsters designed from the ground up to run without back pressure.
However, you could remove the muffler and monkey-fist a straight section of pipe in there just to see what it does--worst case would be a ticket or you could set some grass on fire which would be really bad and likely get you some quality time with Bubba in the showers.
Seriously, Google "exhaust scavenging", lots of information on it.
