Hi-flow Cats?
Thread Starter
|
Senior User
Joined: Oct 2008
Posts: 122
Likes: 0
Hi-flow Cats?
I've got dual pipes with a Super 44 series muffler and 4x24 tips on my 04 F150. How many cats come stock on that truck? I've heard that the best, cheap hi-flow cat is made by thunderbolt. Where do you buy Thunderbolts from? Also, what would be the best cat setup for loudness, not so much worried about performance. Thanks alot for any help.
Senior User
Joined: Oct 2004
Posts: 372
Likes: 0
From: Paola
I noticed to get your exhaust louder on a lot of the newer ford stuff u need to use hi flow cats. I put loud exhaust on my '96 bronco and my '05 stang and they weren't all that loud until I put hi flow cats on them. I used Bassani cats they make universal ones.
Senior User
Joined: Dec 2007
Posts: 256
Likes: 0
From: Sudbury, Ontario
Bassani's stuff is more expensive then most. if you want retarded loud go with a full bassani system my buddy has a 03 lightning with bassani headers, cats x pipe and cat back the thing is LOUD... he was playing around with a harley with straight pipes I was sitting in the pass side of the truck and all i could hear was the exhaust and the Supercharger. Beautiful... sound but not quiet for everyday driving. anyways i could see the bike but couldnt hear it and buddy was hauling on her 
Thread Starter
|
Senior User
Joined: Oct 2008
Posts: 122
Likes: 0
Ok so if I didnt want to replace all of them only cut out the rear two (Ive heard they dont really serve a purpose but to dampen the sound) that will still pass emissions and don't screw up the o2 sensors right? What about gas mileage, will those back two being gone affect that alot?
Senior User
Joined: Jun 2008
Posts: 424
Likes: 0
From: New Jersey
I have a 06 F150 5.4 and i was under mine and i see only 2-cats.... I have a 3" flowmaster from the cats back... edge performance box K&N air intake system. throttle body riser... with all these mods i can see a difference... i aslo turn 35 inch tires... I did disconnect my rear o2 sencors and i seemed to notice a difference.. Maybe mind over matter... but my ck engin light did come on.. So i checked the codes through the edge box and it was my 02 sensors so i hooked them back up and cleared the codes and no more problems... But i want more power... i pull a 6000lb camper.... (toy Hauler) go here to see my toys East Coast ATV Snorkels
Mark
Mark
Trending Topics
Thread Starter
|
Senior User
Joined: Oct 2008
Posts: 122
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / Worst Features Of The 2025+ Ford Expedition
Brett Foote
10 Ways Ford is LOSING to the Competition
Joe Kucinski
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
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
Super Moderator
Joined: Oct 2002
Posts: 8,547
Likes: 6
From: MA
You will not gain any REAL power by messing around with the stock units (nothing you will be able to discern). They flow pretty darn well these days. If you really want some performance gain... spend your money elsewhere 
Post Fiend
Joined: Nov 2001
Posts: 7,698
Likes: 4
From: Neenah, Wisconsin
I might also remind those who haven't read my cat threads before...messing with your cats can be illegal EVEN if you replace them with aftermarkets.... It all has to do with the age of your truck and mileage.....don't wanna listen to me....check with the epa U.S. Environmental Protection Agency
the fines can be as much as 25,000 dollars per offense
the fines can be as much as 25,000 dollars per offense
