Question about high flow cats

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Feb 6, 2009 | 04:52 PM

#16

DarrenWS6

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From: Mansfield, P.A.

Quote:

Originally Posted by 4x4King

hey darren before i go buying these cats, are you sure that the magnaflow 94106 cats will fit a 2003 f150.
andy-jr. and darrenws6, both your exhausts sound realy good ill have to post a video when i get every thing setup.

Yes. My bud Ty has them on his '02 4.6L.

Feb 8, 2009 | 08:28 AM

#17

phatbak

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From: back in Seattle

I was quoted at 2 different places for $450 to replace stock cats with high flows....what have you guys been charged/quoted?

Feb 8, 2009 | 09:13 AM

#18

31 YNOT

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From: Carlyle, IL

Quote:

Originally Posted by DarrenWS6

Y
The part #s that will work are #94306, 94006, and 94106.

94306: most commonly used, very clear and sound allowing cat, with a 12" body thats polished T-304 stainless.

94006: same as above except a little nosier and T-409 stainless ( not shiny )

94106: the loudest of the three, its got a 9" body in T-409, and its the loudest giving a near cat-less sound. Most affordable too at only $67 per cat.

I was wondering why my truck seemed lounder than alot of the vids posted here of high flows, I put on the 94106's and dumped the exhaust

Feb 8, 2009 | 11:10 AM

#19

4wd150

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From: New Jersey

Quote:

Originally Posted by phatbak

I was quoted at 2 different places for $450 to replace stock cats with high flows....what have you guys been charged/quoted?

i think a shop here that will do it quoted me 200-300 roughly. i will see tuesday/wednesday

Feb 8, 2009 | 11:35 AM

#20

31 YNOT

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From: Carlyle, IL

Quote:

Originally Posted by 4wd150

i think a shop here that will do it quoted me 200-300 roughly. i will see tuesday/wednesday

yah i paid 240 for the high flows to be put in plus putting on and dumping the bullet. I already had the parts though

Feb 8, 2009 | 03:02 PM

#21

4wd150

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From: New Jersey

what parts will a shop have to put in for the high flows? basically just another piece of pipe on each side correct?

Feb 8, 2009 | 04:01 PM

#22

DarrenWS6

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From: Mansfield, P.A.

Quote:

Originally Posted by 4wd150

what parts will a shop have to put in for the high flows? basically just another piece of pipe on each side correct?

Yeah, and they'll drill bungs in for the rear O2s and install them.

Feb 8, 2009 | 04:29 PM

#23

4wd150

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From: New Jersey

Quote:

Originally Posted by DarrenWS6

Yeah, and they'll drill bungs in for the rear O2s and install them.

why would they need to do that? the rear set of 02s is in the pipe after the rear cat, they arent in the rear cat so i dont see why they would need to touch any of the sensors

Feb 8, 2009 | 05:53 PM

#24

phatbak

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From: back in Seattle

I was told the front o2 sensors have to be a certain distance from the cats, otherwise you'll trip the CEL.

Feb 8, 2009 | 06:24 PM

#25

MATTIAM

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Joined: Jan 2009

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From: Michigan

Where are you guys ordering your hi flow cats from for best price.

Im thinking true duels. headers to hi flows to 40 series flowmasters then side exit like the lightning only exit on both sides. would i need and x pipe or not

its basiclly like the 98 roush. my buddy has one just have to stop by to check his setup.

Feb 8, 2009 | 07:00 PM

#26

4wd150

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From: New Jersey

i just ordered mine from summitracing.com. they were like 88 a piece. there probably others cheaper but i like their service/fast shipping

Feb 9, 2009 | 08:20 PM

#27

4wd150

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From: New Jersey

had mine installed today! sounds great! wasnt as big of a difference as i was thinking but still sounds sweet! paid 240 plus tax for install

Feb 9, 2009 | 10:17 PM

#28

DarrenWS6

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From: Mansfield, P.A.

Quote:

Originally Posted by 4wd150

why would they need to do that? the rear set of 02s is in the pipe after the rear cat, they arent in the rear cat so i dont see why they would need to touch any of the sensors

My bad, I thought '97 - '03s had them in the center of the rear cats. I never had a older F150 so I have no idea. Either way, awesome.

Quote:

Originally Posted by 4wd150

had mine installed today! sounds great! wasnt as big of a difference as i was thinking but still sounds sweet! paid 240 plus tax for install

Congrats man. How much of a sound increase in percent wise would you say you gained? Put a couple hundred miles on them and report back.

Feb 10, 2009 | 03:11 PM

#29

4wd150

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From: New Jersey

its definately deeper, louder through all rpm's basically and slightly louder/deeper idle. overall im very happy with them. no check engine light today, is there still a chance of it coming on? now just gotta find a place to sell factory cats to, no sense in keeping them. also, thanks Darren for any help you have given me!

and i just noticed a slight smell coming out of tailpipes. is this normal for having new cats?

Last edited by 4wd150; Feb 10, 2009 at 08:37 PM.