Why not true duals?
Thread Starter
|
Senior User
Joined: Jun 2004
Posts: 124
Likes: 0
Why not true duals?
My truck has two catalytic converters and after the cats the pipes merge into one and then goto the muffler and out the back.
I see a lot of folks put on cat-back systems, but not many going to true duals. Why?
Don't true duals flow and sound better? Since it's all after the cat's anyway, I'd think emissions would be unaffected, is that supposition incorrect?
Is there some secret bit of knowledge I'm missing that would explain why catback is (it seems) so much more popular?
I see a lot of folks put on cat-back systems, but not many going to true duals. Why?
Don't true duals flow and sound better? Since it's all after the cat's anyway, I'd think emissions would be unaffected, is that supposition incorrect?
Is there some secret bit of knowledge I'm missing that would explain why catback is (it seems) so much more popular?
Postmaster
Joined: Aug 2004
Posts: 3,392
Likes: 0
From: Greenvile, SC
I'm thinkin' of true duals once my 75K warranty period is nearly up... New headers/pipes all the way back to two indepedent cats and on out to "I'm not sure" what else. Its really going to depend on the market then and if I still have the truck obviously.
I think a lot didn't want to deal with all the "corrective" measures involved with re-assigning the O2 sensors and everything else that may have to be moved or modified for a true dual set-up.
I think a lot didn't want to deal with all the "corrective" measures involved with re-assigning the O2 sensors and everything else that may have to be moved or modified for a true dual set-up.
Junior User
Joined: Aug 2006
Posts: 94
Likes: 0
From: Chicago Burbs
I contacted a reputable muffler shop out by me and spoke to the owner himself. I told him I was thinking about high flow cats and true duals all the way back. He proceeded to tell me that hardly anyone runs "true" duals anymore. Also that the High Flow cats would need to be replaced every 2 years. True?
He quoted me $500 out the door with a cut from the Y back, with a SIDO Flowmaster 40 or 50 series, I forget, and pipes out the sides behind the wheels. Chrome tips extra apparently. This is with 3" piping all the way.
Now for myself, I've seen plenty of pictures from galleries of people running "true" duals and having it done for a descent price. Personally, from my experience with this muffler guy, it sounded to me like he didn't want to have to do the work.
I'm in the same mindset with you though, true duals make me think of a truck that can breathe a little better and the sound would be alot smoother.
He quoted me $500 out the door with a cut from the Y back, with a SIDO Flowmaster 40 or 50 series, I forget, and pipes out the sides behind the wheels. Chrome tips extra apparently. This is with 3" piping all the way.
Now for myself, I've seen plenty of pictures from galleries of people running "true" duals and having it done for a descent price. Personally, from my experience with this muffler guy, it sounded to me like he didn't want to have to do the work.
I'm in the same mindset with you though, true duals make me think of a truck that can breathe a little better and the sound would be alot smoother.
Senior User
Joined: Jan 2007
Posts: 247
Likes: 0
From: Austin, Texas
yeah the tech who ripped me off one flowmaster quoted me at $500 for true duals at first but went down to $450. didnt take the deal thank god. didnt know if high flow cats ahve to be replaced though. id like to know the answer to that too
Junior User
Joined: Mar 2007
Posts: 85
Likes: 0
From: Indiana
Gas tank in the way?
After looking at my truck, I wonder if the huge gas tank is in the way of true dual pipes. I would like to cut the "Y" pipe and run two turbo mufs straight back from the cats, this would give a nice deep tone and make engin breath better without being to loud for my taste. Any thoughts??
04 F150
XLT SCAB
04 F150
XLT SCAB
Junior User
Joined: Jan 2007
Posts: 61
Likes: 0
No problem with the gas tank, the duals can run in the stock pipe location with plenty of room. I have true duals with H pipe on my 05 Fx4, that is all I have run on my last 3 trucks. Cut a little before the Y then run them side by side put in an H pipe this will take care of any low end torque loss. I bought 2 magnaflow 5x11 mufflers part#12586 took them to my muffler guy (good friend) who does excellent work. Total cost 400$ oh yea I added stainless tips. I have had this setup for 2 years well worth it IMO. My cats are after the manifold, no 02 sensor to move. It sounds awesome, with a decent CAI and custom tune (not one out of a box) it will really wake the truck up. Next round of mods are some goodies from Troyer
Trending Topics
MMNC (SS)(Ret)
Joined: Mar 2004
Posts: 11,602
Likes: 148
From: SE Georgia
1. you don't need high flow cats. the stockers can run 400+ HP before you need to consider replacing them
2. true duals will not affect your warranty or your o2 sensors as long as you cut the Y off as far back from the cats as possible
3. you have plenty of room to install the true duals.
4. if you do get a custom true dual, get them to install an H pipe. It will scavenge the gasses and help you make a little more power.
I didn't get true duals because of the price. local shops wanted $500+ for the work using no name mufflers and aluminized piping. So I got the SS Magnaflow SIDO for cheaper.
2. true duals will not affect your warranty or your o2 sensors as long as you cut the Y off as far back from the cats as possible
3. you have plenty of room to install the true duals.
4. if you do get a custom true dual, get them to install an H pipe. It will scavenge the gasses and help you make a little more power.
I didn't get true duals because of the price. local shops wanted $500+ for the work using no name mufflers and aluminized piping. So I got the SS Magnaflow SIDO for cheaper.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
Trojan8975
1987 - 1996 F150 & Larger F-Series Trucks
4
Aug 15, 2011 01:43 PM