Location: Glenburn, North Dakota/Travis AFB California
Vehicle: 1997 Ford F-150
Posts: 30
High flow cats or not
I have a 97 with the 4.6 and do a bit of towing so i was wondering if i cut the back cats out do i leave the front ones or replace them with high flow? I have true dual setup right now and am going to be putting on long tube headers and was just wondering about my cat situation. thank you for any help.
Replace all 4 to be legal and have no CEL, remove the rears only and add O2 sims to keep CEL off and have a nice real loud rumble. But with Longtube headers you will not be able to run the pre-cats so get hi-flows.
__________________ 2006 F150 XLT 5.4 4x4 Performance: Cheap ebay CAI w/ K&N filter, Delta Force tuning Exhaust: Stock manifolds, NO cats, 2.5" true duals, Magnaflow X pipe, Original 40 Series Flowmasters, 3.5" stainless tips Other mods: Nathan Airchime K3LA locomotive horns Exhaust videos: Idle, rev and hammer it! Cruising by Pulling up to an idle Inside accelerating and cruising
__________________ 2006 F150 XLT 5.4 4x4 Performance: Cheap ebay CAI w/ K&N filter, Delta Force tuning Exhaust: Stock manifolds, NO cats, 2.5" true duals, Magnaflow X pipe, Original 40 Series Flowmasters, 3.5" stainless tips Other mods: Nathan Airchime K3LA locomotive horns Exhaust videos: Idle, rev and hammer it! Cruising by Pulling up to an idle Inside accelerating and cruising
did you delete your cats dude. I see you put up some vids.
__________________
John
Thanks Watson91 at S-FX
PTM Century Tonneau
Remote Start 14" si/do Magnaflow 45'd behind rear tires
4" x 18" SS Tips
Roush Grille
Billet Bumper Grille
PTM Mirror caps
DVW Intake w/ K&N drop in
Quote:
Originally Posted by 05RedFX4
Best of luck to you, and hopefully you don't have the same attitude when you go into the dealer to get your trans fixed, because if you do your gonna need a big jar of vaseline cause they are gonna stick it to you, HARD
When he said speaking of which I thought he meant he just did it. I had never noticed it in his sig til last night
__________________
John
Thanks Watson91 at S-FX
PTM Century Tonneau
Remote Start 14" si/do Magnaflow 45'd behind rear tires
4" x 18" SS Tips
Roush Grille
Billet Bumper Grille
PTM Mirror caps
DVW Intake w/ K&N drop in
Quote:
Originally Posted by 05RedFX4
Best of luck to you, and hopefully you don't have the same attitude when you go into the dealer to get your trans fixed, because if you do your gonna need a big jar of vaseline cause they are gonna stick it to you, HARD
I have a 97 with the 4.6 and do a bit of towing so i was wondering if i cut the back cats out do i leave the front ones or replace them with high flow? I have true dual setup right now and am going to be putting on long tube headers and was just wondering about my cat situation. thank you for any help.
Yes, you can definitly run your forward cats, no eliminator's needed - I did it for a few years. Your still within parameters on the 97 and there's no such thing as pre-cats lol. Not sure where that came from, unless this is something new, well not on the 97's anyway.
Can't run forwards with headers, but they flow about the same as High Flows.
With those headers on the 97, you'll need spun barrel High flows if you want to keep the heat shields. The Frame mount shields, you'll miss them if you take them off lol.
__________________ 2006 F150 XLT 5.4 4x4 Performance: Cheap ebay CAI w/ K&N filter, Delta Force tuning Exhaust: Stock manifolds, NO cats, 2.5" true duals, Magnaflow X pipe, Original 40 Series Flowmasters, 3.5" stainless tips Other mods: Nathan Airchime K3LA locomotive horns Exhaust videos: Idle, rev and hammer it! Cruising by Pulling up to an idle Inside accelerating and cruising
__________________ 2006 F150 XLT 5.4 4x4 Performance: Cheap ebay CAI w/ K&N filter, Delta Force tuning Exhaust: Stock manifolds, NO cats, 2.5" true duals, Magnaflow X pipe, Original 40 Series Flowmasters, 3.5" stainless tips Other mods: Nathan Airchime K3LA locomotive horns Exhaust videos: Idle, rev and hammer it! Cruising by Pulling up to an idle Inside accelerating and cruising
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company
Linear Mode
