modified exhaust question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CB24 · 10-16-2009, 12:02 PM

Ok, I'm currently parting out a 1990 LX mustang with a 5.0. While I was tearing it down I found out that the car has a flowmaster exhaust. I'm curious on what you guys think about modifying the exhaust to work on my 69. It'll be some cutting & welding but I don't see why it wouldn't work.

Thoughts?

Jim_PA · 10-16-2009, 12:07 PM

It might make you slower

CB24 · 10-16-2009, 12:10 PM

Quote:

Originally Posted by Jim_PA

It might make you slower

Tx Firefighter · 10-16-2009, 01:12 PM

Should be 2.25 inch stuff. Take the Flowmaster mufflers and those nice factory stainless tips and re-use them. No one is going to guess that those angle cut stainless tips originally came off a Mustang.

SCOTI · 10-16-2009, 01:16 PM

Stock system would be 2.25"; if it's aftermarket, it's prob 2.5".

I know the mufflers would work. The rest of the system could as well w/enough effort. You're the only one who can decide if it's worth the effort though since it's your truck.

CB24 · 10-16-2009, 01:17 PM

Quote:

Originally Posted by Tx Firefighter

Should be 2.25 inch stuff. Take the Flowmaster mufflers and those nice factory stainless tips and re-use them. No one is going to guess that those angle cut stainless tips originally came off a Mustang.

That's what I was thinking only I was going to modify it to where the tips exit behind the doors.

CB24 · 10-16-2009, 01:24 PM

Quote:

Originally Posted by SCOTI

Stock system would be 2.25"; if it's aftermarket, it's prob 2.5".

I know the mufflers would work. The rest of the system could as well w/enough effort. You're the only one who can decide if it's worth the effort though since it's your truck.

I'm pretty sure its 2.5". I just figured it would save me some cash on buying a new exhaust. The exhaust currently on the truck is pathetic. Looks like the bends were made using the PO's knee. Its all crimped. Looks bad & flows worse. Anything at this point will be an improvement. Once my garage is set up I'll give it a go & report back with how it turns out.

SCOTI · 10-16-2009, 01:30 PM

I've purchased Mustang spec'd Flowmasters on more than one GM project because if the project is changed, the Mustang FM's are much easier to re-sell (easier to get more return on your initial investment).

QKENUF4U · 10-16-2009, 01:59 PM

my 88 5.0 was the funnest car i will ever own.... no reason ya cant use what ya can and make it work... mustang flows aint no different than any other flow

cdowns · 10-16-2009, 02:09 PM

the mufflers dont know and could care less weather they're on a ford or chevy

Jim_PA · 10-16-2009, 02:37 PM

Quote:

Originally Posted by cdowns

the mufflers dont know and could care less weather they're on a ford or chevy

Yes, but they were on a Ford at one time, and therefore have been cursed

69GMCLonghorn · 10-16-2009, 05:18 PM

Honestly, unless you're just weld-happy, this seems like too much work. Maybe save the mufflers and reuse them, but to try and modify the pipes?

Also, I agree: The curse of the Ford will be with you always!

F**ed
Over
Rebuilt
Dodge

Found
On
Road
Dead

Fix
Or
Repair
Daily

big mike71 · 10-16-2009, 08:45 PM

First
On
Race
Day

Quote:

Originally Posted by 69GMCLonghorn

Honestly, unless you're just weld-happy, this seems like too much work. Maybe save the mufflers and reuse them, but to try and modify the pipes?

Also, I agree: The curse of the Ford will be with you always!

F**ed
Over
Rebuilt
Dodge

Found
On
Road
Dead

Fix
Or
Repair
Daily

First
On
Race
Day
I didn't really type that did I?

**Boog** · 10-16-2009, 09:12 PM

Quote:

Originally Posted by cdowns

the mufflers dont know and could care less weather they're on a ford or chevy

Who knew?

unclewatts · 10-17-2009, 12:06 AM

You wanna put F**D exhaust system on one of our beloved trucks? SACRALIGE!! Honestly if I have to ride in a F**D I change my pants and wash my hands before I get in my truck to prevent infections.

BAGNDRAGIT · 10-17-2009, 12:16 AM

and backwards,

D-driver
R-returns
O-on
F-foot

and yes the dirty lil f**d does have a curse..

do you all know why the there is an oval as the ford insignia???

Cause henry f**d's mama always taught him to circle his mistakes!!!

10-16-2009, 12:02 PM	#1
CB24 Registered User Join Date: Jul 2009 Location: Surprise, AZ Posts: 138	modified exhaust question Ok, I'm currently parting out a 1990 LX mustang with a 5.0. While I was tearing it down I found out that the car has a flowmaster exhaust. I'm curious on what you guys think about modifying the exhaust to work on my 69. It'll be some cutting & welding but I don't see why it wouldn't work. Thoughts? Last edited by CB24; 10-16-2009 at 12:05 PM.

10-16-2009, 12:07 PM	#2
Jim_PA Registered User Join Date: May 2005 Location: PA Posts: 2,696	Re: modified exhaust question It might make you slower

10-16-2009, 01:12 PM	#4
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: modified exhaust question Should be 2.25 inch stuff. Take the Flowmaster mufflers and those nice factory stainless tips and re-use them. No one is going to guess that those angle cut stainless tips originally came off a Mustang. __________________ I'm on the Instagram- @Gearhead_Kevin

10-16-2009, 01:16 PM	#5
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,951	Re: modified exhaust question Stock system would be 2.25"; if it's aftermarket, it's prob 2.5". I know the mufflers would work. The rest of the system could as well w/enough effort. You're the only one who can decide if it's worth the effort though since it's your truck. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

10-16-2009, 01:30 PM	#8
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,951	Re: modified exhaust question I've purchased Mustang spec'd Flowmasters on more than one GM project because if the project is changed, the Mustang FM's are much easier to re-sell (easier to get more return on your initial investment). __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

10-16-2009, 01:59 PM	#9
QKENUF4U Senior Member Join Date: Jan 2005 Location: SUNNY WARM BIKE RIDING COTTONWOOD ARIZONA Posts: 2,097	Re: modified exhaust question my 88 5.0 was the funnest car i will ever own.... no reason ya cant use what ya can and make it work... mustang flows aint no different than any other flow

10-16-2009, 02:09 PM	#10
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: modified exhaust question the mufflers dont know and could care less weather they're on a ford or chevy __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

10-16-2009, 05:18 PM	#12
69GMCLonghorn Registered User Join Date: Dec 2006 Location: Porter Ranch, CA Posts: 978	Re: modified exhaust question Honestly, unless you're just weld-happy, this seems like too much work. Maybe save the mufflers and reuse them, but to try and modify the pipes? Also, I agree: The curse of the Ford will be with you always! F**ed Over Rebuilt Dodge Found On Road Dead Fix Or Repair Daily

10-17-2009, 12:06 AM	#15
unclewatts 70 Chevrolet=Obsession Join Date: Jun 2009 Location: nice ca Posts: 1,067	Re: modified exhaust question You wanna put FD exhaust system on one of our beloved trucks? SACRALIGE!! Honestly if I have to ride in a FD I change my pants and wash my hands before I get in my truck to prevent infections. __________________ I'm Just like my truck. Old, Ugly and Grouchy. Except my truck starts easily in the morning and doesn't smoke! IT'S NOT EASY BEING GREEN! -Kermit the frog 1970 Chevrolet C-10 Longbed Stepside : 350, Muncie M20, 3.08 GM corp. positraction Forest green exterior/light green interior(Where all my money goes) 1996 Toyota Corolla (Parts runner)

10-17-2009, 12:16 AM	#16
BAGNDRAGIT Just Not Low Enough! Join Date: Mar 2009 Location: Phoenix, AZ Posts: 525	Re: modified exhaust question and backwards, D-driver R-returns O-on F-foot and yes the dirty lil fd does have a curse.. do you all know why the there is an oval as the ford insignia??? Cause henry fd's mama always taught him to circle his mistakes!!! __________________ NEED ELECTRICAL HELP? ASK ME! 67-72 Full Wiring Diagrams Lots Of Info, TAKE A LOOK 1967 Chevy C-10 Shortbox Bagged 327 4spd Previous: 1971 Chevy C-10 Short Sep I6 Auto (Traded) 1973 Chevy C-20 THE REDNECK BATTLE TRUCK 2001 Chevy Silverado 2Dr 5.3L Shortbox. R.I.P. 1969 Volkswagen Bug This is my first meeting, I have a horsepower problem.

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