100, 200, or 300 cell catalytic converters
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From: Orange County
Viper SRT-10, CLS 55 AMG, 2012 Tacoma Off Road 4x4
100, 200, or 300 cell catalytic converters
I just installed my MBH LT's with 3'' catless midsection and want to know what the 'best' cat would be for highly modded 55's?
I know the 100 cell can cause a check engine light, but that is a simple fix with a tune, also I searched this topic and the only thing I could find was the 100 cell cats can cause the exhaust gasses to bounce around too much. I want max flow, max HP/TQ.
Who makes the best quality cats on the market? I've had many melt or blow apart on past cars, so I'd like to do this right the 1st time...
I know the 100 cell can cause a check engine light, but that is a simple fix with a tune, also I searched this topic and the only thing I could find was the 100 cell cats can cause the exhaust gasses to bounce around too much. I want max flow, max HP/TQ.
Who makes the best quality cats on the market? I've had many melt or blow apart on past cars, so I'd like to do this right the 1st time...
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Thread Starter
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Joined: Mar 2011
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From: Orange County
Viper SRT-10, CLS 55 AMG, 2012 Tacoma Off Road 4x4
What about these? They look very high quality, anyone used this brand?
http://www.ebay.com/itm/200-CPSI-Cel...#ht_500wt_1127
http://www.ebay.com/itm/200-CPSI-Cel...#ht_500wt_1127
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From: Orange County
Viper SRT-10, CLS 55 AMG, 2012 Tacoma Off Road 4x4
These look even better because the rear bung is right behind the mesh so it may keep you from having to extend the rear o2 wire. This shipping is very expensive...
http://www.ebay.com/itm/Catalytic-Co...ht_2157wt_1344
http://www.ebay.com/itm/Catalytic-Co...ht_2157wt_1344
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From: Orange County
Viper SRT-10, CLS 55 AMG, 2012 Tacoma Off Road 4x4
What I really want to know are the performance number between no cats, 100, 200, 300 cell cats. Almost everyone that does the catless LT's says they feel a noticeable low end power loss due to lack of back pressure, this is why I'm asking about the cats. Can this low end power loss be corrected with a tune only, or is that the way it is when going catless?
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Viper SRT-10, CLS 55 AMG, 2012 Tacoma Off Road 4x4
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The best aftermarket hi-flow cats are made by Random Technology. They offer three versions of their 4" bullet shaped cats, two are metallic with a 100 cell matrix(race) and a 300 cell matrix (street). The third is a lower performance ceramic substrate. The 300 cell metallic has extremely high flow and is more expensive than most of the other aftermarket cats at about $225 each. Part number is 141-30000. Before taking the plunge on these, I decided to ditch the crappy ceramic cats that were included with my MBH midpipes and spring for some metallic substrate cats from Flowmonster which are not quite as expensive:
http://flowmonster.com/c-181168-cata...-metallic.html
I'll be putting them on this weekend and will report on them later. At the end of the day, though, I plan to buy the Random Technology cats. They're the best. FWIW, Random's website is currently down after being hacked, but lot's of aftermarket shops sell their products.
http://flowmonster.com/c-181168-cata...-metallic.html
I'll be putting them on this weekend and will report on them later. At the end of the day, though, I plan to buy the Random Technology cats. They're the best. FWIW, Random's website is currently down after being hacked, but lot's of aftermarket shops sell their products.
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1990 300ce supercharged and intercooled
+1 on the Random Technologies. Also cell count is not everything. A lot of cheaper cats will have much thicker walls in the honeycomb with low cell count and flow worst than a higher quality cat with more cells and that is actually doing something. Besides unless you just put in a cheap cat to pass emissions and then remove it afterwards they do not last long. You will have to buy new ones every couple of years to pass again.
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From: Houston, Tx.
2004 E55
The best aftermarket hi-flow cats are made by Random Technology. They offer three versions of their 4" bullet shaped cats, two are metallic with a 100 cell matrix(race) and a 300 cell matrix (street). The third is a lower performance ceramic substrate. The 300 cell metallic has extremely high flow and is more expensive than most of the other aftermarket cats at about $225 each. Part number is 141-30000. Before taking the plunge on these, I decided to ditch the crappy ceramic cats that were included with my MBH midpipes and spring for some metallic substrate cats from Flowmonster which are not quite as expensive:
http://flowmonster.com/c-181168-cata...-metallic.html
I'll be putting them on this weekend and will report on them later. At the end of the day, though, I plan to buy the Random Technology cats. They're the best. FWIW, Random's website is currently down after being hacked, but lot's of aftermarket shops sell their products.
http://flowmonster.com/c-181168-cata...-metallic.html
I'll be putting them on this weekend and will report on them later. At the end of the day, though, I plan to buy the Random Technology cats. They're the best. FWIW, Random's website is currently down after being hacked, but lot's of aftermarket shops sell their products.
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one car at a time
Cats for emissions purposes, eliminating nasty odor, and helping the environment...I cannot believe there would be more than a few hp lost with RT cats....I have used these before on turbo'd applications and tested vs. straight pipes and saw minimal difference in hp.
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ML550
Update - the Flowmonster cats are now sold.
Last edited by komp55; Mar 28, 2012 at 06:24 AM.
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From: Orange County
Viper SRT-10, CLS 55 AMG, 2012 Tacoma Off Road 4x4
I have been talking with Random Technology about their Cats and they make a super high flow race cat (part# 153-30000), it expands to a 5'' OD and tappers back down to 3'' OD with a 100 cell metallic substrate (not sure about clearance with the 3'' MBH LT's). The rep from Random Technology told me these cats maxed out their flow meter at 675 CFM!! Do you guys think I would have clearance issues??
Last edited by vipermike; Mar 26, 2012 at 05:58 PM.
Thread Starter
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Joined: Mar 2011
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From: Orange County
Viper SRT-10, CLS 55 AMG, 2012 Tacoma Off Road 4x4
MBWorld Fanatic!
Joined: Jan 2007
Posts: 1,359
Likes: 6
ML550
Thread Starter
Member
Joined: Mar 2011
Posts: 193
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From: Orange County
Viper SRT-10, CLS 55 AMG, 2012 Tacoma Off Road 4x4
