high flow cats
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 127
Likes: 0
high flow cats
Can anyone out there give me some info on high flow cats. I am putting cold air intake and dual cat backs on 98 F-150 and would like to get the most out of them as I can. Are they worth the trouble?
Moderator
Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
Yes, the front 2 are actually like preheaters to help the main cat's work better. There are 2 per side. This is why Chebby's and Dodge's are so much louder than a Ford when you install a Flowmaster muffler. They don't use as many.
Junior User
Joined: Mar 2004
Posts: 51
Likes: 0
If you do replace the 4 with 2 high flow what kind of gain? WIll it not make the check engine light go off? I changed these on my old chevy silverado when I changed over to a flowmaster and there was a nice change in performance. With fords four cat system and living in california, if you changed to two would it pass the smog test?
Trending Topics
Junior User
Joined: Mar 2004
Posts: 76
Likes: 0
From: Whitehouse,TX
Originally Posted by Justen
wait a minute, I don't know much about ford trucks but did you just say they have 4 cats
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