MagnaFlow High-Flow Cats Question

Reply Subscribe

Thread Tools

Search this Thread

Mar 31, 2017 | 09:14 AM

#31

rmillsISF

Pit Crew

Joined: Oct 2013

Posts: 199

Likes: 3

From: Tennessee

The O2 sensor sniffs to make sure the cat is working. The O2 sensor goes after the cats

Mar 31, 2017 | 09:48 AM

#32

flowrider

Lexus Champion

iTrader: (9)

Joined: Nov 2008

Posts: 11,261

Likes: 2,392

From: Arizona

Quote:

Originally Posted by isfvss

Can someone explain, I thought you need o2 before the cats to get a correct A/F ratio, and 4 hours JUST to weld in cats is a joke $480 supplied and fitted maybe??

There are o2 sensors before and after the cats. Read this for an explanation:

http://www.autotap.com/techlibrary/u...en_sensors.asp

Lou

Mar 31, 2017 | 10:51 AM

#33

jat0223

Instructor

iTrader: (1)

Joined: Mar 2012

Posts: 769

Likes: 24

From: NY

Even though they look the same, there are two type of sensors. The A/F ratio sensors, which come before the cats and then there are the O2 sensors, which come after the cats. They do different jobs and have different part numbers. You can disable the O2 sensors with a tune or simulator. You can't do that to the A/F ratio sensors.

Apr 4, 2017 | 12:06 PM

#34

i3urton

Lexus Test Driver

Joined: Jul 2007

Posts: 1,125

Likes: 1

From: ca

how much did yiou guys pay to get the high flow cats install on your borla exhaust?

Apr 4, 2017 | 12:14 PM

#35

msgs350

Pole Position

iTrader: (2)

Joined: Feb 2010

Posts: 2,581

Likes: 246

From: WA

Quote:

Originally Posted by i3urton

how much did yiou guys pay to get the high flow cats install on your borla exhaust?

Mine was installed the same time the Borla was and the shop took a total of 6 hours. My Borla was also welded together in 2 spots rather than using the clamps.

Apr 4, 2017 | 12:56 PM

#36

flowrider

Lexus Champion

iTrader: (9)

Joined: Nov 2008

Posts: 11,261

Likes: 2,392

From: Arizona

^^^^^You are indeed a wise man

Lou

Apr 4, 2017 | 04:00 PM

#37

FFM

Racer

Joined: Nov 2014

Posts: 1,419

Likes: 135

From: WA

Old discussion. But far as I was aware GESI cats are pretty much the GOAT. Spendy but you get what you pay for.

Nov 16, 2017 | 10:42 AM

#38

iH8RICERZ

Racer

iTrader: (4)

Joined: Apr 2011

Posts: 1,409

Likes: 295

From: CA

Sorry to revive this thread, but I just got my PPE's installed, paired up with my borla catback system. The last time the cabin of the car smell this bad was when I was running rich on my integra on a full gutted header to catback system....don't miss it and I know my wife is going to hate it so now it's time to drop some more money on these magnaflow cats. So 2.25" is what's recommended, correct? Has anyone else used any other brand high flow cats besides random techs?

Any recommendations on where to order the MagnaFlow 59905's?

ClubLexus Stories

Celebrating Lexus & Toyota from Around the Globe

10 Lexus Designs That Have Aged Like Fine Wine

Verdad Gallardo

8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

Michael S. Palmer

10 Best Lexus Models No One Remembers

Joe Kucinski

TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

Michael S. Palmer

Top 10 Lexus & Toyotas to Drive Before You Die!

Joe Kucinski

Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

Joe Kucinski

Lexus LC500 Convertible Auction: A Preview of Rising Values?

Brett Foote

GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

Michael S. Palmer

9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

Joe Kucinski

2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

Brett Foote

Nov 16, 2017 | 11:46 AM

#39

flowrider

Lexus Champion

iTrader: (9)

Joined: Nov 2008

Posts: 11,261

Likes: 2,392

From: Arizona

^^^^^

https://www.summitracing.com/parts/mpe-59905?seid=srese1&cm_mmc=pla-google-_-shopping-_-srese1-_-magnaflow&gclid=Cj0KCQiAi7XQBRDnARIsANeLIeuzLEJnPIX5R5ctPyLY2kjdT8bXXdlU5K6utei35o6ChlHgN8zkOAcaAlyiEALw_wcB

https://www.amazon.com/MagnaFlow-59905-Universal-Catalytic-Converter/dp/B000XQO2EG/ref=sr_1_1?ie=UTF8&qid=1510861562&sr=8-1&keywords=magnaflow+59905

Pict of mine with my old PPE header.

Lou

Attached Thumbnails

MagnaFlow High-Flow Cats Question-cat-from-side.jpg

Nov 16, 2017 | 01:12 PM

#40

Rossi

Racer

iTrader: (6)

Joined: Oct 2012

Posts: 1,411

Likes: 237

From: Ca

Quote:

Originally Posted by flowrider

Pict of mine with my old PPE header, Lou

Lou, looking at the photo, you have relocated the O2 sensors behind what would regularly be secondary cats.
Does that men you did not need to run the conditioners with your headers?

Nov 16, 2017 | 02:38 PM

#41

flowrider

Lexus Champion

iTrader: (9)

Joined: Nov 2008

Posts: 11,261

Likes: 2,392

From: Arizona

^^^^No, I'm running CEL Eliminators from PPE! All stock and third party exhausts whether with cats or not have the o2 oxygen sensor in the exhaust pipe following the manifold/header. The Manifold/header has only fitting for the before sensor.

Lou

Last edited by flowrider; Nov 16, 2017 at 02:50 PM.

Nov 18, 2017 | 08:23 PM

#42

lexicon72

Advanced

Joined: Jul 2014

Posts: 502

Likes: 194

From: Ohio

Running full catless with PPE headers and Joe Z exhaust. Smell doesn' bother me at all (and more importantly, the wife) So now I have magnaflow 59956 hi Flo cats BNIB I don't need.

Nov 21, 2017 | 11:11 AM

#43

iH8RICERZ

Racer

iTrader: (4)

Joined: Apr 2011

Posts: 1,409

Likes: 295

From: CA

So the MagnaFlow 59905 isn't CA state legal so I'm having trouble finding a pair that will ship them to me since its "illegal" to ship this particular high flow cat to CA. Any of you have any other recommendations for a high-flo cat thats CA legal? I don't want something too restrictive but I do want to eliminate the exhaust fumes. Its fine if I leave the windows rolled up, but the smell is pretty bad if I crack my windows or when I get out of my car.

Nov 21, 2017 | 11:30 AM

#44

flowrider

Lexus Champion

iTrader: (9)

Joined: Nov 2008

Posts: 11,261

Likes: 2,392

From: Arizona

^^^^ http://support.magnaflow.com/02catal...alCARB/460.asp

Lou

Dec 15, 2017 | 06:01 PM

#45

Vitveet

Racer

Joined: Sep 2014

Posts: 1,521

Likes: 270

From: Nc

Quote:

Originally Posted by flowrider

^^^^^

https://www.summitracing.com/parts/m...caAlyiEALw_wcB

https://www.amazon.com/MagnaFlow-599...agnaflow+59905

Pict of mine with my old PPE header.

Lou

Those are the exact same 2 products correct? Why such a price difference?!? Are these the best cats to go with? And lastly, do I need just one or 2?
I have joeZ exhaust on the car now and about to install Sikky V2 headers.

V.

Reply Share

First
Prev
3 / 4
Next
Last

Forum Jump