Exhaust question PLEASE HELP ME!
Thread Starter
|
Freshman User
Joined: Mar 2012
Posts: 48
Likes: 0
Exhaust question PLEASE HELP ME!
All 4 of my cats are plugged up on my 01 F150 4.6 supercrew. My plan is to remove the front pre-cats and install two new Magnaflow cats with o2 bungs. My truck has two O2 sensors in the pipe right after the manifold and then two more in the second cats not in the pipe. The problem I am having is trying to find a pipe that will replace the weird bend in the front cats. I was thinking of using a flex pipe from the manifolds to the second cats and then strait out to the muffler. Will these work?
http://www.summitracing.com/parts/sum-652514/overview/
The front pre-cats are like a 45 degree angle in and then a 90 degree angle out so a standard strait pipe from the auto parts store wont work.
http://www.summitracing.com/parts/sum-652514/overview/
The front pre-cats are like a 45 degree angle in and then a 90 degree angle out so a standard strait pipe from the auto parts store wont work.
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
You do need help.
Don't do what your purposing.
Replace both sides with after market assemblies and eliminate all the hassle you will have trying to rig some foreign arrangement that likely will result in codes..
If you need inspection it won't pass.
Good luck.
Don't do what your purposing.
Replace both sides with after market assemblies and eliminate all the hassle you will have trying to rig some foreign arrangement that likely will result in codes..
If you need inspection it won't pass.
Good luck.
Thread Starter
|
Freshman User
Joined: Mar 2012
Posts: 48
Likes: 0
One one my second cats is plugged and the others have loose material moving around inside so its not far from being a problem. Im not spending 600+ for cheapo aftermarket replacements so I decided to make my own stainless steel magnaflow set up.
Thread Starter
|
Freshman User
Joined: Mar 2012
Posts: 48
Likes: 0
I don't need inspection and don't even really need cats on the truck at all. I don't like not running any cats thats why I am replacing the 4 with two Magnaflows because I don't see the need for the precats. Most people Ive seen on here that have my set-up do the same thing because it doesn't throw codes. If I removed the second two cats then I would get a CEL and the truck might not run correctly. The first set of O2 sensors are in the pipe after the manifold and I am not touching them. The second set are in the second cats and I am just removing them and installing them into the new magnaflows. I know everything will fit and weld in without issue other than the flex pipes. Thats where I am running into isuues, Replacing the weird pre-cats that have weird angles. I can't just replace them with pipe unless it is a custom bend thats why i am using the flew pipe. Everything is on order along with a nut splitter to break the nuts off the manifold studs. I will post my progress and results as I go for future reference to anyone who wants to have a better than stock replacement set-up for under $300.
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
What experience have you that tells you aftermarket is that cheap?
Better tell some of the big name exhaust suppliers that.
I have one side from a well known supplier that has not given any problem.
You must understand that after market units are not meant to last the same length of time as an OEM because the truck now has a more limited life span than from new.
.
It's a lot like people come here and after the motor has high mileage and worn want to put expensive oil in thinking it has some magic advantage.
.
For example the rear OEM cats are almost twice the size of aftermarket cats for the normal usual life of the truck.
Replacements at a truck age of 100k miles or more is not cost effective at the same size when you consider OEM cats both sides are nearly $2500.
Makes $600 look pretty good for what life the truck has left..
Mine is at 202,000 miles and expect to be running well into 275k+
Your cats were likely abused in some manner from gross cylinder misfires that melted them or from physical abuse.
I'm only trying to offer you another perspective and info from experience and not debating you on you position.
I wish you luck with the endeavor.
Better tell some of the big name exhaust suppliers that.
I have one side from a well known supplier that has not given any problem.
You must understand that after market units are not meant to last the same length of time as an OEM because the truck now has a more limited life span than from new.
.
It's a lot like people come here and after the motor has high mileage and worn want to put expensive oil in thinking it has some magic advantage.
.
For example the rear OEM cats are almost twice the size of aftermarket cats for the normal usual life of the truck.
Replacements at a truck age of 100k miles or more is not cost effective at the same size when you consider OEM cats both sides are nearly $2500.
Makes $600 look pretty good for what life the truck has left..
Mine is at 202,000 miles and expect to be running well into 275k+
Your cats were likely abused in some manner from gross cylinder misfires that melted them or from physical abuse.
I'm only trying to offer you another perspective and info from experience and not debating you on you position.
I wish you luck with the endeavor.
Trending Topics
Thread Starter
|
Freshman User
Joined: Mar 2012
Posts: 48
Likes: 0
I am saying that Magnaflow STAINLESS STEEL is a better option than some company Ive never heard of. I don't want to spend $300 a side for the replacement that is going to rust in 6 months. I am making a custom set-up the way I want it for half the price with better quality parts. Im sure the replacement pipes are just fine for the life of the truck but why not buy better parts? I can weld them myself and also get rid of the pre-cats which are 100% useless to me. I am replacing everything from the manifolds to the tail pipe(ordered a magnaflow muffler also) for around $300.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Thread
Thread Starter
Forum
Replies
Last Post
Nick_lebbad
1987 - 1996 F150 & Larger F-Series Trucks
14
Feb 26, 2012 10:52 AM
F150_Oz
1987 - 1996 F150 & Larger F-Series Trucks
5
Jul 18, 2009 09:25 AM