Gauging Interest in a 3" exhaust from Cattman
10-28-2010, 03:37 PM
#241
I talked to Schmelly about this yesterday. We help make up for a short y-pipe by adding a loose 3/8" flange between the b-pipe and cat (you can put one on either side of the cat is 3/4" take-up is needed) along with an extra gasket and longer bolts.
Everybody know this... This b-pipe is heavier than stock by quite a bit, and moves back and forth on the hangers more as a result. New exhaust hangers are a MUST! Plan on it, and its not a bad idea to have 2-3 small hose clamps on hand to go around the outside of the hangers to provide more control. NISMO hangers will work best, but they're pricey and sometimes hard to find, so try the Walker Exhaust OEM replacements; part #s are 35725 (buy 3) and 35460 (buy one).
It was pretty tight routing the b-pipe around the gas tank, next to the rear suspension. Needed to leave some air between the tubing and tank for obvious reasons, which leaves it near the trailing arm "hub". If necessary, use the hose clamps around the muffler hangers to limit the back and forth movement in that tight spot.
Send your friends, we still have 3 systems left!
Brian
Everybody know this... This b-pipe is heavier than stock by quite a bit, and moves back and forth on the hangers more as a result. New exhaust hangers are a MUST! Plan on it, and its not a bad idea to have 2-3 small hose clamps on hand to go around the outside of the hangers to provide more control. NISMO hangers will work best, but they're pricey and sometimes hard to find, so try the Walker Exhaust OEM replacements; part #s are 35725 (buy 3) and 35460 (buy one).
It was pretty tight routing the b-pipe around the gas tank, next to the rear suspension. Needed to leave some air between the tubing and tank for obvious reasons, which leaves it near the trailing arm "hub". If necessary, use the hose clamps around the muffler hangers to limit the back and forth movement in that tight spot.
Send your friends, we still have 3 systems left!
Brian
10-28-2010, 04:48 PM
#244
The catback is designed to fit like stock, meaning that it bolts right up to the back end of the cat as long as the cat is in the stock position, and all the hangers are in the stock positions. Doesn't matter if the cat is stock as long as the rear flange is exactly where the rear flange of the stock cat is supposed to be.
Give us a call if you'd like to order, I'll only be in my office from 3:30-5:00pm MST/PDT, tomorrow (Friday, 29 Oct.); back in the office Monday morning at 9am MST (2 hours earlier than east coast time after the end of daylight savings time on Sunday).
Brian
Give us a call if you'd like to order, I'll only be in my office from 3:30-5:00pm MST/PDT, tomorrow (Friday, 29 Oct.); back in the office Monday morning at 9am MST (2 hours earlier than east coast time after the end of daylight savings time on Sunday).
Brian
10-28-2010, 07:14 PM
#245
wouldnt the exhaust being pulled forward away from the rear bumber misalign everything causing some other more noticeable rubbing, i mean , using 3 inch seems pretty tight as is... more install pics of rear bumper for all you GD guys please.
10-28-2010, 08:04 PM
#247
...Everybody know this... This b-pipe is heavier than stock by quite a bit, and moves back and forth on the hangers more as a result. New exhaust hangers are a MUST! Plan on it, and its not a bad idea to have 2-3 small hose clamps on hand to go around the outside of the hangers to provide more control. NISMO hangers will work best, but they're pricey and sometimes hard to find, so try the Walker Exhaust OEM replacements; part #s are 35725 (buy 3) and 35460 (buy one)...
missed that part.
10-28-2010, 09:10 PM
#249
10-28-2010, 11:50 PM
#250
I'm 90% positive it terminates in the same spot as OEM. I installed my ypipe and HFC at different times and do not recall any issues with the ypipe terminating earlier than the OEM ypipe. I reused the OEM hangers on my ypipe, so I'll check them out tomorrow and see if they seem to be pushing or pulling with respect to the rear of the car.
Edit: I checked it out today and confirmed that the ypipe terminates earlier than OEM, pulling the exhaust inward/away from the bumper.
Edit: I checked it out today and confirmed that the ypipe terminates earlier than OEM, pulling the exhaust inward/away from the bumper.
Now it all makes sense.
10-29-2010, 12:01 AM
#251
Yesterday, I went back to where we did the original mock-up and had the 3" system installed. It was also a good opportunity for Scott the fabricator to see it installed in person and check the alignment of things. We noticed it would bang the trailing arm as Brian pointed out, hence his comment about the need for more rigid exhaust hangers.
I was relieved to see that the tip fell where it should be. Looks great IMO.
Also, keep in mind guys, you'll notice that the exhaust gets really close to the car where the muffler and Bpipe flange is located. Use the back of a hammer or something and push the heat shield up an inch to give you some additional clearance and to avoid it banging in the future.
On with the pics....
I was relieved to see that the tip fell where it should be. Looks great IMO.
Also, keep in mind guys, you'll notice that the exhaust gets really close to the car where the muffler and Bpipe flange is located. Use the back of a hammer or something and push the heat shield up an inch to give you some additional clearance and to avoid it banging in the future.
On with the pics....
Last edited by The Wizard; 08-22-2011 at 01:57 AM.
10-29-2010, 06:48 AM
#252
If it is banging in moderate to heavy movement? Are you talking side to side or fwd and aft( like straight line accelerations)? I found my old 2.5" (pic is w/the new 3")to bang the hangar stud aft of the resonator @ the 90 degree bend, during hard r/h turns so this is what I did......those are some old shock bushings! Nice looking exhaust system there buddy! Welcome to the 3" Cattman catback family!
Last edited by CMax03; 10-29-2010 at 06:50 AM.
10-29-2010, 08:15 AM
#253
Thanks. You're the second person now to say that. LOL
10-29-2010, 03:02 PM
#254
Didn't have any luck finding exhaust hangers yesterday. NAPA wanted $6 a pop. Checker didn't have any in stock, they said the earliest I could get them was the end of next week. Autozone had generic ones that looked similar to the walker hangers. I may bring one of my hangers in and see how they compare.
10-31-2010, 01:34 AM
#255
Sorry about that. I suppose the difference of less than an inch wasn't noticeable when moving the pipes around to get the studs through the exhaust flanges. The tip placement looks really good on your car!
Didn't have any luck finding exhaust hangers yesterday. NAPA wanted $6 a pop. Checker didn't have any in stock, they said the earliest I could get them was the end of next week. Autozone had generic ones that looked similar to the walker hangers. I may bring one of my hangers in and see how they compare.
Didn't have any luck finding exhaust hangers yesterday. NAPA wanted $6 a pop. Checker didn't have any in stock, they said the earliest I could get them was the end of next week. Autozone had generic ones that looked similar to the walker hangers. I may bring one of my hangers in and see how they compare.
10-31-2010, 01:38 AM
#256
Last edited by aackshun; 10-31-2010 at 01:51 AM.
11-01-2010, 07:09 AM
#257
Black Lion
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Since I wont be installin mine for quite some time, I'll have to rely on the results you guys post for now. Im waiting to get all my turbo parts to do everything in one shot. So it seems there may be some MINOR rubbing issues around the heat shield and back and forth movement. Something for me to keep in mind when Im ready to install mine.
11-02-2010, 05:01 AM
#260
11-02-2010, 07:12 PM
#261
11-03-2010, 06:11 AM
#262
Not liking that fitment of the tail pipe, do you plan on altering the exhaust to extend it?
11-03-2010, 09:52 PM
#263
Since I wont be installin mine for quite some time, I'll have to rely on the results you guys post for now. Im waiting to get all my turbo parts to do everything in one shot. So it seems there may be some MINOR rubbing issues around the heat shield and back and forth movement. Something for me to keep in mind when Im ready to install mine.
11-03-2010, 11:11 PM
#265
Don't worry, don't worry, the legit dyno comparison will NOT be on a 'stang dyno. It will be done on the same dynojet I used for my first dyno.
Yah, I'm doin what they said earlier in the thread and then some... I'm going to put in a 2.75" test pipe, since It's custom, I can extend it to 13" which will help with fitment, but I won't do anything like that until I install the OBX's.
11-04-2010, 04:59 AM
#266
Nope, it was on a Dynojet, I'm more interested in the curves than the numbers, 2 pulls for $30 is a helluva deal.
Don't worry, don't worry, the legit dyno comparison will NOT be on a 'stang dyno. It will be done on the same dynojet I used for my first dyno.
Yah, I'm doin what they said earlier in the thread and then some... I'm going to put in a 2.75" test pipe, since It's custom, I can extend it to 13" which will help with fitment, but I won't do anything like that until I install the OBX's.
Don't worry, don't worry, the legit dyno comparison will NOT be on a 'stang dyno. It will be done on the same dynojet I used for my first dyno.
Yah, I'm doin what they said earlier in the thread and then some... I'm going to put in a 2.75" test pipe, since It's custom, I can extend it to 13" which will help with fitment, but I won't do anything like that until I install the OBX's.
11-04-2010, 05:22 AM
#267
The stock cat size is supposedly 12.5 inches, I haven't measured anything out yet, but the exhaust was designed to sit further back in the first place, right?
11-04-2010, 07:53 AM
#268
Black Lion
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Wiz, I think you convinced me. I may just go ahead and install it. I know I need new hangers as Brian posted, Im assuming new gaskets in between the flanges as well? Or can I re-use the old gaskets? If I can't re-use the old gaskets, where can I get the new gaskets? Any part numbers? This will be my first time installing any exhaust myself
11-04-2010, 09:30 AM
#270
11-04-2010, 09:50 AM
#271
Black Lion
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Yes it does protrude a slight bit. On My 2.5 it is exactly the same way. Brian and his exhaust guy designed it to protrude the same on the 3" If you are using either Cattman ypipes, fastcats or headers the tip should protrude like the original design intended it to.
11-05-2010, 08:10 AM
#274
11-06-2010, 12:10 PM
#278
More pics and a full review coming after I install the system on my boosted 99. Haven't installed it yet. Very soon though. Next up is to install subframe collars and this 3" exhaust on the boosted 99.
Wiz, I think you convinced me. I may just go ahead and install it. I know I need new hangers as Brian posted, Im assuming new gaskets in between the flanges as well? Or can I re-use the old gaskets? If I can't re-use the old gaskets, where can I get the new gaskets? Any part numbers? This will be my first time installing any exhaust myself
If you do need new gaskets, I'd ask Brian for part OEM part #'s or maybe just order directly from Brian and use what he normally provides; which seem to be good quality gaskets.
Last edited by The Wizard; 08-22-2011 at 02:00 AM.
11-06-2010, 04:29 PM
#279
I use the OEM SS gaskets located @ the Cat, throughout my 3" exhaust system....From the Ypipe/Cat flange> the aft resonator/bpipe flange> the bpipe/rear muffler section flange.....Use a dremel to open up the I.D.; been reusing my gaskets @ the cat for 7 yrs now! Three Exhaust systems thus far....Oem>Cattman 2.5">Cattman 3"......LOL
http://www.courtesyparts.com/20692m-...tml?cPath=1783&
http://www.courtesyparts.com/20692m-...tml?cPath=1783&
Last edited by CMax03; 11-06-2010 at 04:32 PM.
11-07-2010, 09:52 AM
#280
Black Lion
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I use the OEM SS gaskets located @ the Cat, throughout my 3" exhaust system....From the Ypipe/Cat flange> the aft resonator/bpipe flange> the bpipe/rear muffler section flange.....Use a dremel to open up the I.D.; been reusing my gaskets @ the cat for 7 yrs now! Three Exhaust systems thus far....Oem>Cattman 2.5">Cattman 3"......LOL
http://www.courtesyparts.com/20692m-...tml?cPath=1783&
http://www.courtesyparts.com/20692m-...tml?cPath=1783&