exhaust

Hi all, So I've been searching the forums for an idea but haven't seem to have found my scenario yet which is as follows: (1999, 4.0, 225K+ miles) When i start the jeep when cold, until it gets to temp there's a tick that seems to be relative to RPMs. So, constant tick-tick-tick speed while...

Hey everyone! First time posting here and am hoping for some advice. My 14 year old son bought a 2006 TJ. It's a manual 2.4L and runs great but we are slowly repairing varies things along the way before he gets his drivers license. The error codes we're receiving are: P0420 P0456 P0137 P0138...

The PO of our LJ removed the third cat (yay) and stock muffler to install an obnoxiously loud glass pack (boo). The exhaust needs work anyway as it’s already been bashed in by the front driveline. I’m going to see if they can add a flange in the y-pipe (to make removal for rear main seal...

Hello- I was tired of the rattling my old rusted exhaust was making so i broke out the sawzall and cut the exhaust in front of the cat converter. so my exhaust pipe is just stubbed out before the skid plate. My question is, Until i can get it to a shop to weld on new pipe and muffler, what are...

So i replaced my o2 sensors with the NGK sensors about 7k miles ago. Didn’t have codes for a while, but just checked it today and I’m pulling codes P0031, p0051, & p0136 (all related to o2 sensors). I’m also pulling codes for p0303 (cylinder 3 misfire) and p0455 (evaporation emission system...

Good evening everyone, I've recently noticed a drastic change in my Jeeps gas mileage from around 15mpg to now 9-10mpg. I'm pretty good at keeping up with the maintenance (no check engine lights), and I know my lift & 35" tires don't help but I've had those modifications on for the past 4 years...

I have for sale a 49 state legal catalytic converter made by Eastern. It was on my Jeep when I bought it, but wouldn’t pass emissions in CA. It did pass emissions in TX fwiw. The cat itself is in good shape, but the piping downstream is rough. Make an offer!

I was wondering if any of you have used the Novak block hugger headers for a TJ Gen lll swap? If so, have they been reliable, leak free and have you been generally happy with them after putting some miles and years on them? So that's the primary question but to expand a bit if you care to read...

Hey Guys, So recently I was on my way home and at a stoplight had a misfire in cylinder 2, and my exhaust sounded funny and fluttery, I was like 8 minutes away so I decided to drive it home and coast down hill. Long story short, I replaced the spark plugs, still had issues. I checked my coil...

For sale is a cat-back exhaust from a 2000 Wrangler TJ with a 4.0L. The complete system is made of stainless steel. The muffler is made by Magnaflow. It has a very throaty aggressive sound. I am building a 4-Link and this exhaust is not compatible with my new suspension. Get this one for a...

Has anyone cut out the resonator in their 4.0? Im thinking to leave the two cats, cut out the resonator and weld in a pipe. This paired with the banks monster exhaust i think could add a little more crackle into the sound of the exhaust. Please let me know if there is any problems with doing...

I bought my 2006 Jeep LJ from a buddy not too long ago and he has it straight piped. After a couple of months of daily driving the droning got to me. Found a 40 series Flowmaster muffler on Facebook and bought it. Cut a piece out of the pipe, used some adapters and now it was bearable....... I...

So I needed to drop my exhaust to get to my oil pan. I separated the exhaust at the flanges just above the Cats and upon re-installing it sounds horrible. What did I miss? Are they miss-aligned? Are there seals/doughnuts that I did not see? Any thoughts?

2001 TJ 4.0L I6 - just put on a Metalcloak 3.5" lift. When putting on the rear passenger shock, it is tight against the exhaust pipe. I drove it 25 miles and the black sheath around the shock melted. How can I force the exhaust pipe toward the center of the jeep to get it off the shock. Then...

Not sure where to put this thread but my girlfriend recently got an Fj because she couldn't afford a JK. lol, I know that's not the answer. I tried to convince her to get a TJ but she says they're too old. Anyway, the Fj forum is crap so I'm going to ask here. I'm getting 3 codes. A P0420...

Hi all, looking to replace some parts on my stock exhaust on my 04 rubicon. People on here seem to like the thrust muffler. My question is, will this particular muffler( part number 17651) slide right into the 2.25" tailpipe and clamp on or need some other modifications? Also plan on removing...

I plan on replacing the entire exhaust system on my '04 with the 4.0, but I'm rather confused as to its setup. I notice on my TJ that the exhaust manifold splits into 2 pipes that converge directly in front of the oil pan, and then head to the catalytic converter. However, with all the exhaust...

Will running exhaust out front of rear tire, degrade the tire, over time, causing rubber in tire to become brittle over time, etc.? like this setup? https://www.buyautoparts.com/data/all_images/17122.jpg http://up.picr.de/1635590.jpg...

When I first purchased my 2004 TJ earlier last Spring (end of March or so?), soon after having it - in the morning, it would whistle. After a few minutes, it would quiet down and go away - and I wouldn't hear it again, until the next morning. Researching it led me to believe it was the IAC...

Hi All, So I'm getting the magnaflow cats and a banks exhaust installed. I noticed on the last road trip that the floor in the back got really warm. Not blazing hot but warm. the bottom of my ice cooler was warm to the touch. Is that normal? Will insulating the exhaust system remedy that? Is it...