Went to install 5th gen muffler, but ran into multiple problems- HELP!
Went to install 5th gen muffler, but ran into multiple problems- HELP!
So I went to Meineke to install the 5th gen muffler I got a while ago after realizing that I wouldn't be able to do the work myself due to the flange being about a foot away from the stock location. Within a minute of being on the lift we noticed a few things:
1. The piping leading up to the muffler on the 5th gen is actually smaller than that of the stock 4th gen muffler and B-pipe. This would therefore create a bottleneck, negating any possible performance gains from the 5th gen muffler. Even using entirely new piping from the end of the muffler back wouldn't solve the problem since the actual inlet is about 1/8" smaller than the 4th gen. Why would Nissan do this?
2. While the piping coming out of the 4th gen muffler only goes about 5" then ends with the flange, the piping out of the 5th gen muffler actually goes all the way over the beam and follows the general direction of the 4th gen B pipe, and is about 16" long. Therefore something would need to be cut and welded. I was told there were two ways that it could possibly be done, one without the flange, costing about $80, while if I wanted to try and use to flange, the price would be somewhere around $150 if no other pipes would have to be bent.
Now I know people have done this before, but I don't remember reading about any of these problems arising. With all the work this is looking to be, I'm thinking of just buying another OEM 4th gen muffler and doing the work myself, but I want look/performance gains from the 5th gen muffler. Any ideas guys?
BTW- Search was down when I tried to search the subject....
1. The piping leading up to the muffler on the 5th gen is actually smaller than that of the stock 4th gen muffler and B-pipe. This would therefore create a bottleneck, negating any possible performance gains from the 5th gen muffler. Even using entirely new piping from the end of the muffler back wouldn't solve the problem since the actual inlet is about 1/8" smaller than the 4th gen. Why would Nissan do this?
2. While the piping coming out of the 4th gen muffler only goes about 5" then ends with the flange, the piping out of the 5th gen muffler actually goes all the way over the beam and follows the general direction of the 4th gen B pipe, and is about 16" long. Therefore something would need to be cut and welded. I was told there were two ways that it could possibly be done, one without the flange, costing about $80, while if I wanted to try and use to flange, the price would be somewhere around $150 if no other pipes would have to be bent.
Now I know people have done this before, but I don't remember reading about any of these problems arising. With all the work this is looking to be, I'm thinking of just buying another OEM 4th gen muffler and doing the work myself, but I want look/performance gains from the 5th gen muffler. Any ideas guys?
BTW- Search was down when I tried to search the subject....
Mine went on fine - had them cut and weld here: http://www.jatan.net/muff5.jpg
Not much of a performance gain, but good if you want a stock quiet ride
Not much of a performance gain, but good if you want a stock quiet ride
Originally Posted by JaTaN
Mine went on fine - had them cut and weld here: http://www.jatan.net/muff5.jpg
Not much of a performance gain, but good if you want a stock quiet ride
Not much of a performance gain, but good if you want a stock quiet ride
Originally Posted by Kevlo911
The 5th gen inlet is about 1.75-2.0in 
But any decent exhaust shop can make the 2.5" bpipe work on it.
But any decent exhaust shop can make the 2.5" bpipe work on it.
But I was told that because the actual inlet into the muffler is that size, that not matter how big the b pipe is (mine is stock), there will always be a restriction where the inlet it. I'm not sure how much that smaller diameter piping will affect flow, but I'm not sure I want to find out either.
Yes the pipe restricts slightly but because of the muffler flap and dual pipes you actually get some pretty good velocity and scavanging effect. I found the muffer added much more than 1hp and I'm happy.
BEJAY1 and JaTan:
Where did you guys install the muffler? Any good muffer shop/.org affiliates who could do a good job on this?
It's funny reading BEJAY1 location...I was just in South Elgin last week when my ignition switch died (bought and installed new on from Woodfield Nissan).
Where did you guys install the muffler? Any good muffer shop/.org affiliates who could do a good job on this?
It's funny reading BEJAY1 location...I was just in South Elgin last week when my ignition switch died (bought and installed new on from Woodfield Nissan).
Originally Posted by ardika
BEJAY1 and JaTan:
Where did you guys install the muffler? Any good muffer shop/.org affiliates who could do a good job on this?
It's funny reading BEJAY1 location...I was just in South Elgin last week when my ignition switch died (bought and installed new on from Woodfield Nissan).
Where did you guys install the muffler? Any good muffer shop/.org affiliates who could do a good job on this?
It's funny reading BEJAY1 location...I was just in South Elgin last week when my ignition switch died (bought and installed new on from Woodfield Nissan).
Mostly all places wanted $50-$70 just to weld the muffler, but I also needed to replace the cat bolts ($10-$15 for each bolt) and I also needed to replace the exhaust pipe and muffler on my mom's Civic. Found a shop that cut me a good deal if I got both cars done there. $160 for my mom's Civic and $75 for mine (replaced the cat bolts, welded the muffler, and they even loosened my y-pipe bolts lol)
JaTan:
The switch costed me $35 including tax. They tried to sell me at their "list" price, $48 plus tax, but he agreed to bring it down to $32 plus tax.
I believe $75 for the job is definitely a good deal. I guess I need to look around.
The switch costed me $35 including tax. They tried to sell me at their "list" price, $48 plus tax, but he agreed to bring it down to $32 plus tax.
I believe $75 for the job is definitely a good deal. I guess I need to look around.
Originally Posted by BEJAY1
Yes the pipe restricts slightly but because of the muffler flap and dual pipes you actually get some pretty good velocity and scavanging effect. I found the muffer added much more than 1hp and I'm happy.
JaTaN- Got that pic?
Originally Posted by sdoherty_tjm
the smaller inlet shouldnt matter much because the air is colder and more condensed. it might make a difference, but not much.
Originally Posted by 95maxrider
So you think that even with the slightly smaller piping, there should be no HP lost, and possibly even some gained?
Originally Posted by sdoherty_tjm
its traveled farther, thats why there is such a thing as thermal wrap, to keep the exhuast gas warmer and moving faster.
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