300 Exhaust Help Needed
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Senior User
Joined: Nov 2001
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300 Exhaust Help Needed
1990 F-150 2X4 E4OD 3.73 limited slip 38,000 original miles!
All factory exhaust wanted to remove cats and then go with a 3" pipe out to the factory location, for muffler I thought about the DynoMax muffler. Do not like how those flowmasters sound especially on a friends nissan v-6, sounds like a moped!
Thanks.
All factory exhaust wanted to remove cats and then go with a 3" pipe out to the factory location, for muffler I thought about the DynoMax muffler. Do not like how those flowmasters sound especially on a friends nissan v-6, sounds like a moped!
Thanks.
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
300 Exhaust Help Needed
I have a Dynomax cat-back with a Super Turbo muffler and it has a deep sound but is not overpowering. I just gutted the first cat recently and it got louder, so with no cats that should give you a good deep rumble that's not extremely loud. If you want something louder, you can go with a Dynomax Ultra Flow. They are supposed to outflow Borla, Flowmaster, Gibson, and Edelbrock.
Postmaster
Joined: Mar 2002
Posts: 3,545
Likes: 4
From: Coal Region
300 Exhaust Help Needed
best thing to do is remove the 2nd and run 2.5" pipe. i did this with a flow 40 series and it made a nice improvment and sound is nice. dont need anything over 2.5" pipe on a stock 300...
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
300 Exhaust Help Needed
You can find the part numbers on http://www.dynomax.com/trucks.stm and then you can go to http://store.summitracing.com/defaul...get=search.asp to give you a ball park figure for the price of them. Summit would probably be a good place to get them from too. I think NAPA can special order them too if you wish.
EDIT: the link above is for cat-back systems. They also have the muffler specs by themselves - http://www.dynomax.com/mufflers.stm
EDIT: the link above is for cat-back systems. They also have the muffler specs by themselves - http://www.dynomax.com/mufflers.stm
Last edited by EPNCSU2006; Jan 23, 2003 at 09:15 PM.
Thread Starter
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Senior User
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300 Exhaust Help Needed
EPNCSU2006
What were the model #'s of the catback and muffler you used? What size exhaust pipe did you run? I looked on the website but and on the PDF files and could not find any one for a 1990 F-150 300.
What were the model #'s of the catback and muffler you used? What size exhaust pipe did you run? I looked on the website but and on the PDF files and could not find any one for a 1990 F-150 300.
Elder User
Joined: Jun 2002
Posts: 851
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From: Elizabeth City, NC
300 Exhaust Help Needed
Originally posted by pcman
EPNCSU2006
What were the model #'s of the catback and muffler you used? What size exhaust pipe did you run? I looked on the website but and on the PDF files and could not find any one for a 1990 F-150 300.
EPNCSU2006
What were the model #'s of the catback and muffler you used? What size exhaust pipe did you run? I looked on the website but and on the PDF files and could not find any one for a 1990 F-150 300.
Reg. Cab, Short Bed (116"), Reg. Cab, 44293 2
Long Bed (133"), Ext. Cab, Short Bed
Exits on Passenger Side
2.5 inch inlet, 2.25 inch out
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Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
300 Exhaust Help Needed
I'm not exactly sure what the specifics are on the exhaust I have, as it was given to me for my 16th birthday. The 300 should be the same p/n as the 5.0, and 5.8 for your year. The kit I have I think is 2 1/2" from cat to muffler, and dual 2 1/4" tail pipes that exit in the stock location. I think those kits are the only ones for the 87-96 trucks on the pdf. I have the super turbo because my dad didn't want my truck to be that loud. It gives a good deep sound but isn't loud enough to get annoying. I did notice a slight increase in volume since i got rid of the plugged up front cat.
Last edited by EPNCSU2006; Jan 27, 2003 at 11:31 AM.
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