just installed a cattman catback on thursday and i have this strange noise during moderate to full throttle acceleration, it will make the noise acouple times during the acceleration through the gear , went under neath and couldn't see any leaks, almost a bees in the can style noise,has anyone had this problem? it deffinately sounds like its coming from the rear

 

you installed a catback and didnt think the noise would be different?

 

not the exhaust tone, it has somewhat of a vibration kind of noise during acceleration, is it possible that the leak only occurs during high exhaust pressures? cause it deffinately wasnt leaking at idle.

 

if its vibration then its probably hitting a cross member...under acceleration, the engine pivots back a little which could cause the exhaust to hit if its to close.

 

are there any fixes for this or anything?

 

see if thats the problem first...look under the car to see if its close to anything. if its close, crab the exhaust and move it around to see if it touches.

 

just went out to the car and you are right, its hitting the upper cross member brace, its almost sitting on it. damn

 

OH MY

 

I took both cross members off. Also, I used the heavy-duty Nismo hangers when I installed my Cattman Cat-back.

 

so has anybody found a good way to solve this problem?

 

is that safe to remove?

where did you get those hangers, nissan dealer?

 

I may be wrong, but I read that new exhaust hangers is the way to go

 

you got the nismo hangers and still had to remove the cross-member? that can't be to good for your suspension

 

im right again

 

washers, longer screws if you cant figure out the rest well

 

i guess ill try to figure it out, pretty vague advice, thanks

 

Get some hose clamps and wrap them around your hangers. Tighten them up and they will adjust the catback in a way that it will not hit your crossmember. Another option is to realign the exhaust system... which involves loosening the bolts for the cat, b-pipe, and the rear section and reinstall them all but raise the exhaust (with jacks or have a friend push) every time you tighten a bolt.

 

thanks for the help everyone

 

no cross members for 2 years and no worries or banging

 

problem solved! i got the bolts loose, pushed up on the pipe and had someone tighten it, now it sits perfectly over the crossmember

 

I should have realigned the muffler after putting the b-pipe in.Melted the bumper:

 

^ hmm that actually looks pretty good LOL

 

well they put my b-pipe on and my sexy tips are crooked...

 

It still looks good though cant really see the melting.

 

the person who wrote post #4 is a genius

 

That genius should fix that problem in post #23

 

I don't think the rear section in isolation necessarily causes a bad fit... it is a combination of everything else you have.

My Frankencar cat-back fit fine until I got Cattman headers, which cause everything to be pulled tighter for more ground clearance (a good thing) and it rattled on the heat shield around the muffler which I just pulled off, yet, I didn't have that issue when I had the headers, Frankencar B and the Cattman rear (which has a smaller can). With the Megan rear, the rattling came back, but it was from a different spot, the heatshield by the first bend in the b-pipe, which I just bent out of the way. I have had hoseclamps on all my hangers for every set-up.

I need to put that one cross brace back on and see how that works out... if I can still find it. LOL.

My point here is just that sometimes aftermarket set-ups may require some tweaking, but it shouldn't be major. IMO, quality on the popular parts that the 5th Gens have is pretty decent these days.

 

check your resonator, cattman puts a small weld bead at the front end of the resonator pipe to make sure it is installed correctly. If you get under the car you should not see the bead. If you can see the bead the resonator needs to be removed and installed correctly.



As you can see this resonator is installed upside down. It is a common mistake because installers do not read instructions.

 

I hate rust

 

you bumped a thread to say that

 

make this guy a mod already.

 

hey he's at fifteen posts now. YAY

 

completely off topic but, choiiiiiiiii, i'm from L'ville...small world

 

Really? Could you please explain how an engine which is sitting sideways can hit a crossmember which is running front to back? There are some serious problems going on if your motor is torquing from left to right. Our motors torque front to back which is inline with the crossmember...

 

I really hope this is a joke... If not, god help you.

 

 

so sue me, I read the post wrong.

 

I had that same problem when I initially installed my Cattman exhaust! It's the heat shield aft of the brace in the 90 degree turn b4 that rear section connection! Just push the shield away from the exhaust with a large screwdiver or hammer! As for the exhaust hangars: two choices Nismo ($$$) or Napa ! Each are a hell of alot better than OEM, they're stiffer and contain mor material! That small brace can be spaced with some washers!

 

so you tried to call me out (and was rude about it)...when i was right?

cool

 

I just used some hose clamps.They work great.No need to buy new rubbers.