E55 mid pipe Exhaust facts!
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From: Texas
2003 CL55
E55 mid pipe Exhaust facts!
HadiLaw donated his mid pipe, cats and resonator for me to check out.. I wanted to use the cats for my mid pipe but did not work out.. My 3" mid pipe, with X is pictured below (still in the works)..Two magnaflow race cats will be in the front at 3lbs each, as I recall.. This will make the whole mid pipe weigh in at a svelte 21lb or 15 with off road set up!
The E55 mid pipe after the cats and between the resonator, is only around 2.5" to my suprise, even though most the pipes are 2.75.. This section of pipe , cats and resonator weighs 40lbs!!! Does not count the large primary cats either..
Last, I have seen several post on a rumor that the resonator has an X built into it.. First the resonator has holes inside it and that would defeat the X purpose and second it only has a crossover tube in it and not an X..
Hope this helps with a visual and ways to desing your mid pipes of the future..
The E55 mid pipe after the cats and between the resonator, is only around 2.5" to my suprise, even though most the pipes are 2.75.. This section of pipe , cats and resonator weighs 40lbs!!! Does not count the large primary cats either..
Last, I have seen several post on a rumor that the resonator has an X built into it.. First the resonator has holes inside it and that would defeat the X purpose and second it only has a crossover tube in it and not an X..
Hope this helps with a visual and ways to desing your mid pipes of the future..
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
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From: Southern Cali (Ontario)
well.. I had the bug to get more sound.. and took my car to my cousin's muffler shop.
We took the 2nd cats out and placed 2.5" pipes and straight back to a generic 2.5 (dual) X cross over instead of the resonator. As noted, the 2.75 pipes is very rare for most vehicles. Magnaflow X pipes with 2.5 will work.
I was thinking of doing X cross over on the 2nd cats too.. but I left them as free flowing as possible.
The result, better sound and better initial throttle response. Also, at 70mph there is no drone. Only around 50 to 60 at lower revs.. but its very deep and not annoying.
Around town.. car sounds deep but not "throaty" like a mustang or vette. Just lower tone. ON the high rpm's its comes to life a bit more.
I would say... for those with just resonator removal..I would take the 2nd cats off too.
I'm pushing close to 480RWHP and I would say that this mod help specially when the supercharger is engaged around 2k rpms and above.
I do have 178mm pulley, so getting rid of more exhaust quicker should account for a small gain. The better throttle response is just icing.
Btw: no torque loss under 2k rpms.
We took the 2nd cats out and placed 2.5" pipes and straight back to a generic 2.5 (dual) X cross over instead of the resonator. As noted, the 2.75 pipes is very rare for most vehicles. Magnaflow X pipes with 2.5 will work.
I was thinking of doing X cross over on the 2nd cats too.. but I left them as free flowing as possible.
The result, better sound and better initial throttle response. Also, at 70mph there is no drone. Only around 50 to 60 at lower revs.. but its very deep and not annoying.
Around town.. car sounds deep but not "throaty" like a mustang or vette. Just lower tone. ON the high rpm's its comes to life a bit more.
I would say... for those with just resonator removal..I would take the 2nd cats off too.
I'm pushing close to 480RWHP and I would say that this mod help specially when the supercharger is engaged around 2k rpms and above.
I do have 178mm pulley, so getting rid of more exhaust quicker should account for a small gain. The better throttle response is just icing.
Btw: no torque loss under 2k rpms.
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From: Texas
2003 CL55
3" Magnaflow race cats came in today. Only 2 lb each and very compact.. Second pictures shows how light shines right through..
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
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instagram @ultimate_pd
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dd
We took the 2nd cats out and placed 2.5" pipes and straight back to a generic 2.5 (dual) X cross over instead of the resonator. As noted, the 2.75 pipes is very rare for most vehicles. Magnaflow X pipes with 2.5 will work.
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From: Texas
2003 CL55
With 600 RWHP in the plans, going smaller than stock 2.75 would cause me to lose sleep.. I have 3" cats, custom 3" mid pipe and then will reluctantly reduce the mid pipe down into 2.75 stock tail section.. At least for now..
I have 3" cats, custom 3" mid pipe and then will reluctantly reduce the mid pipe down into 2.75 stock tail section.. At least for now..
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
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Wait, are those going to be your primary cats? If so, don't waste your time. I clogged a set in a few weeks at 600rwhp. Don't know exactly why, but the cats clogged and destroyed my rear O2 sensors when the material moved down the pipe. Gut them and get someone to tune the computer so you don't get a CEL from no cats.
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Sorry, late night. To be more specific, they were my primary cats and I had no secondaries. They completely clogged, resulting in a misfire in 3 cylinders (no motor damage thank god), and when we went to take out the O2 sensor behind the cats, they wouldn't unscrew. 45 minutes, a pair of channel locks, and a hammer later, they came out, and what we saw was almost hysterical. The clogged cat material had worked its way out of the cat, down the pipe, and physically dented the O2 sensor, which kept it from being able to be removed. They were magnaflows, look exactly the same as the OP's, were 3" on both sides, about 10 inches long (counting the flanges) maximum, and you could see through them. I am 99% sure that they are the same as the OP's, and I am trying to save him some headaches down the road.
OP, I am telling you, don't use these cats. Either leave the pipe alone, or gut the cats if you need to pass a visual inspection. Putting those cats in will lead to them clogging after awhile, and then you will be kicking yourself for doing it.
OP, I am telling you, don't use these cats. Either leave the pipe alone, or gut the cats if you need to pass a visual inspection. Putting those cats in will lead to them clogging after awhile, and then you will be kicking yourself for doing it.
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Thread Starter
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Joined: Jun 2008
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From: Texas
2003 CL55
Sorry, late night. To be more specific, they were my primary cats and I had no secondaries. They completely clogged, resulting in a misfire in 3 cylinders (no motor damage thank god), and when we went to take out the O2 sensor behind the cats, they wouldn't unscrew. 45 minutes, a pair of channel locks, and a hammer later, they came out, and what we saw was almost hysterical. The clogged cat material had worked its way out of the cat, down the pipe, and physically dented the O2 sensor, which kept it from being able to be removed. They were magnaflows, look exactly the same as the OP's, were 3" on both sides, about 10 inches long (counting the flanges) maximum, and you could see through them. I am 99% sure that they are the same as the OP's, and I am trying to save him some headaches down the road.
OP, I am telling you, don't use these cats. Either leave the pipe alone, or gut the cats if you need to pass a visual inspection. Putting those cats in will lead to them clogging after awhile, and then you will be kicking yourself for doing it.
OP, I am telling you, don't use these cats. Either leave the pipe alone, or gut the cats if you need to pass a visual inspection. Putting those cats in will lead to them clogging after awhile, and then you will be kicking yourself for doing it.
I am guessing your clogged cats were on another car and not a S/C benz? An Extremely rich motor or a lot of blow will clog a cat and pressure will blow it out.. Also if cats are to far back, they will not get hot enough to burn off ..
I am running cats,,, as I want to be legal..Not because I have to be..
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I am guessing your clogged cats were on another car and not a S/C benz? An Extremely rich motor or a lot of blow will clog a cat and pressure will blow it out.. Also if cats are to far back, they will not get hot enough to burn off ..
I am running cats,,, as I want to be legal..Not because I have to be..
I am running cats,,, as I want to be legal..Not because I have to be..
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From: Southern, CA.
V12-Biturbo
(running 600+ rwhp on any DJ) I've been running some very similar looking 3" 300 cell cats as Primaries for about (2) months now mated up to stock location (SL600/65 has no 2ndary cats in stk form) New bungs added to work w/OEM O2's (Zero chk Engine lights) or problems so far & pushing ton of air w/my mods... I also use race gas frequently 100+ Oct, AFR set to 12-12.5
Hoping they last if not easily/cheaply replaceable, running kitty-free in CA is NOT an option.
Hoping they last if not easily/cheaply replaceable, running kitty-free in CA is NOT an option.
Last edited by Thericker; Dec 6, 2009 at 08:09 PM.
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From: Texas
2003 CL55
[QUOTE=Thericker;3840385
Hoping they last if not easily/cheaply replaceable, .[/QUOTE]
My thoughts too.
Rare for Texas racers to run cats but there is that Karma thing.. I also hate to stink up the Armani with raw gas waste..
Hoping they last if not easily/cheaply replaceable, .[/QUOTE]
My thoughts too.
Rare for Texas racers to run cats but there is that Karma thing..
I also hate to stink up the Armani with raw gas waste..
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
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facebook.com/ultimatepd
E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
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Nothing special
(running 600+ rwhp on any DJ) I've been running some very similar looking 3" 300 cell cats as Primaries for about (2) months now mated up to stock location (SL600/65 has no 2ndary cats in stk form) New bungs added to work w/OEM O2's (Zero chk Engine lights) or problems so far & pushing ton of air w/my mods... I also use race gas frequently 100+ Oct, AFR set to 12-12.5
Hoping they last if not easily/cheaply replaceable, running kitty-free in CA is NOT an option.
Hoping they last if not easily/cheaply replaceable, running kitty-free in CA is NOT an option.
http://www.car-sound.com/02product/d...niversal=59959
Edit:
I just realized I had the exhaust in the back of my truck. Pics of the carnage in a minute. BTW, the stock cats held up perfectly fine on the same exact tune.
Edit, pics:
Here, you can see where the cat material actually hit the rear O2 sensor:
Here, you can see how far the material actually moved down the pipe:
Over all view of the pipe with cats for comparison (Fedor Dezyn pipes with the Magnaflow cats fitted afterwards, let's not go there):
You should be able to see cat material in the shot, but since it went all the way down the pipe, there's nothing to see there:
Last edited by justans10; Dec 6, 2009 at 11:31 PM.
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From: Southern, CA.
V12-Biturbo
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From: Texas
2003 CL55
http://www.car-sound.com/02product/d...niversal=59959
The above cats may have failed from having a stock 2" inlet pipe going into the cat? They are designed for 3" in and 3" out.. 2" in, may have put to much pressure in the center of the cat under large HP?
Last edited by Exotic-metal55; Dec 7, 2009 at 05:49 PM.
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From: Southern, CA.
V12-Biturbo
The cats below are what I purchased. Conflicting info on the cell count.. 200 to 300 count is what I have seen for this part #.. Most likely they are 200 cell. They list for 95 each on most sites but I scored then for 66.00 each.. Like you said; they clog, they get changed.. Air filters cost almost that much..
http://www.car-sound.com/02product/d...niversal=59959
The above cats may have failed from having a stock 2" inlet pipe going into the cat? They are designed for 3" in and 3" out.. 2" in, may have put to much pressure in the center of the cat under large HP?
http://www.car-sound.com/02product/d...niversal=59959
The above cats may have failed from having a stock 2" inlet pipe going into the cat? They are designed for 3" in and 3" out.. 2" in, may have put to much pressure in the center of the cat under large HP?
http://cgi.ebay.com/ebaymotors/Thund...Q5fAccessories
Last edited by Thericker; Dec 7, 2009 at 07:11 PM.
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'06 E55, '15 Jeep SRT8, '94 Mustang GT
