460 High Flow Cats?
Lead Driver
Joined: Feb 2002
Posts: 7,970
Likes: 595
From: Greater Austin, Texas
I don't run a cat. My truck is over 25 years old so I took it out (no emissions testing in Texas for >25 YOA vehicles). The OEM cat is a big, ugly thing.
If your engine is not modified quite a bit, you don't need a "high-flow" cat IMO. I am not sure they could prove they flow any more than OEM in any case. Mostly you are just getting a new, clean cat.
If your engine is not modified quite a bit, you don't need a "high-flow" cat IMO. I am not sure they could prove they flow any more than OEM in any case. Mostly you are just getting a new, clean cat.
Senior User
Joined: Feb 2012
Posts: 397
Likes: 2
Poke a steel rod thru the cat to open it up, but leave it on the truck so that it looks like it is still doing it's job. Mine does not have to be emission tested either, but it has to have all of that stuff on the truck, APPEARING to be working.
Thread Starter
|
New User
Joined: Mar 2020
Posts: 17
Likes: 0
That's an option. The main thing is that I'm doing a cat-back exhaust, upgrading to 3", which even with a gutted cat, it'd still be the bottleneck. Although it'd probably flow much better once gutted so it might be a solid interim solution until I dump the extra money into a high flow or decide to just cut it out. Mostly I'm just a pansy that doesn't want to get that super rare, but super expensive ticket for no cat.
Lead Driver
Joined: Jul 2017
Posts: 9,612
Likes: 1,182
From: San Jose, CA
I don't get tested anymore, but I've actually added cats to my older trucks with swapped-in EFI just to clean up the exhaust. I'm not worried about that last couple of horsepower, so a cat is a no-brainer for me.
I used Magnaflow brand high-flow cats, but I can't tell you anymore how much they cost. But using $100 bucks as your max outlay is going to limit you drastically I would expect. Unless someone has an unused one on Craigslist they no longer need, I can't imagine many cats for less than $100.
Not sure what they go for these days, but I'd still get one even if they were more than that. And I'm still always on a tight budget.
Good luck. But look on Craigslist and the for-sale forums hereabouts too. Just in case someone did not finish their project.
Paul
I used Magnaflow brand high-flow cats, but I can't tell you anymore how much they cost. But using $100 bucks as your max outlay is going to limit you drastically I would expect. Unless someone has an unused one on Craigslist they no longer need, I can't imagine many cats for less than $100.
Not sure what they go for these days, but I'd still get one even if they were more than that. And I'm still always on a tight budget.
Good luck. But look on Craigslist and the for-sale forums hereabouts too. Just in case someone did not finish their project.
Paul
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
Universal Magnaflow 3" converter: Magnaflow 99109HM Summit Racing
~$118 USD plus tax/shipping. States it fits Chevy big blocks, should work on a Ford.
When I replaced the entire exhaust on my old 1992 F350 4x4 w/5.8L engine I used a Magnaflow 59929. No emission testing here, but I like to breathe clean air. At the time that converter was rated for a higher GVW, Magnaflow downgraded it a few years ago I noticed. The 99109HM may be the golden ticket you are looking for.
~$118 USD plus tax/shipping. States it fits Chevy big blocks, should work on a Ford.
When I replaced the entire exhaust on my old 1992 F350 4x4 w/5.8L engine I used a Magnaflow 59929. No emission testing here, but I like to breathe clean air. At the time that converter was rated for a higher GVW, Magnaflow downgraded it a few years ago I noticed. The 99109HM may be the golden ticket you are looking for.
Trending Topics
Lead Driver
Joined: Jul 2017
Posts: 9,612
Likes: 1,182
From: San Jose, CA
Same here. I was surprised at the improved smell on my '68.
When the '98 Explorer engine was installed, still 100% stock right down to the exhaust manifolds and EGR setup, it actually put out a surprisingly nasty exhaust smell.
Adding the cat took care of about 90% of that. Happier now for sure.
The '93 F150 actually smells surprisingly nasty right now too. Wonder if that means that the original cat has seen better days? Could also be a tired old air pump I suppose.
Going to replace the pump first, since I know it's in sad shape. If that doesn't do the job I'll replace the cat too.
Paul
When the '98 Explorer engine was installed, still 100% stock right down to the exhaust manifolds and EGR setup, it actually put out a surprisingly nasty exhaust smell.
Adding the cat took care of about 90% of that. Happier now for sure.
The '93 F150 actually smells surprisingly nasty right now too. Wonder if that means that the original cat has seen better days? Could also be a tired old air pump I suppose.
Going to replace the pump first, since I know it's in sad shape. If that doesn't do the job I'll replace the cat too.
Paul
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic 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
Thread Starter
|
New User
Joined: Mar 2020
Posts: 17
Likes: 0
Awesome, I went ahead and ordered the Magnaflow 99109 as well as the flange adapter from Bear River (https://www.bearriverconverters.stor...roduct-reviews) and should be able to do a full 3" exhaust from the manifold flange for under $350.
Thread
Thread Starter
Forum
Replies
Last Post
Halloran1
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
2
Apr 9, 2012 11:53 PM