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post #1 of 8 (permalink) Old 01-30-2009, 11:49 AM Thread Starter
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Smile Downtubes

Does anybody know where i can buy downtubes for my 1991 Thunderbird Sport 5.0 HO? The current downtubes look like a major restriction..Thanks.. :-)
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post #2 of 8 (permalink) Old 01-30-2009, 12:00 PM
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Your best bet is just to find a local exhaust shop and have them bend some up for you.

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post #3 of 8 (permalink) Old 02-25-2009, 01:00 PM
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if you have stock manifolds or mn12 shorty headers then the supercoupe performance v-6 2.25 downtubes will mate rite up with no fab work
mike

1990 ford f150 5.0
1989 cougar xr-7 5spd 5.0 --249hp/[email protected]
stock bottom end 200k plus miles,afr165 heads,explorer intake,75mm tb,80mm maf,e-cam,30lbs injecters,mac 1 5/8 long tubes,homebuilt foreward manual transbrake aod,3.73 gears,welded open diff,100 zex wet shot
1989 mustang gt [email protected]
1984 tbird 5.0 auto
1999 chevy tracker...wtf!!!!!
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post #4 of 8 (permalink) Old 03-22-2009, 03:11 PM
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hows ur downtubes going?
mike

1990 ford f150 5.0
1989 cougar xr-7 5spd 5.0 --249hp/[email protected]
stock bottom end 200k plus miles,afr165 heads,explorer intake,75mm tb,80mm maf,e-cam,30lbs injecters,mac 1 5/8 long tubes,homebuilt foreward manual transbrake aod,3.73 gears,welded open diff,100 zex wet shot
1989 mustang gt [email protected]
1984 tbird 5.0 auto
1999 chevy tracker...wtf!!!!!
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post #5 of 8 (permalink) Old 03-22-2009, 06:47 PM Thread Starter
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Hey Mike..I decided to hold off on any exhaust mods at the moment..Getting my truck in tip top shape first..She's still in storage anyway..but I am gonna keep what you told me in mind when i change up the exhaust..thanks again Mike..

Rayo..

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1991 Ford Thunderbird Sport

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post #6 of 8 (permalink) Old 03-22-2009, 07:12 PM
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ok,
the whole front section of my exhaust is for sale.from the shorty header all the way back and will connect to the stock rear section.
i am going to have to go with long tubes b4 i can get any further tuning done
mike

1990 ford f150 5.0
1989 cougar xr-7 5spd 5.0 --249hp/[email protected]
stock bottom end 200k plus miles,afr165 heads,explorer intake,75mm tb,80mm maf,e-cam,30lbs injecters,mac 1 5/8 long tubes,homebuilt foreward manual transbrake aod,3.73 gears,welded open diff,100 zex wet shot
1989 mustang gt [email protected]
1984 tbird 5.0 auto
1999 chevy tracker...wtf!!!!!
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post #7 of 8 (permalink) Old 03-22-2009, 07:25 PM Thread Starter
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Long tubes are definitely the way to go If you plan on some high horsepower in the future..For what I'm doing I'll stick with my shorties..I may be interested in just the downtubes..I'll let you know..

Rayo..

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1991 Ford Thunderbird Sport

"If you don't know where you're going..Any road will take you there." George Harrison
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post #8 of 8 (permalink) Old 03-22-2009, 07:29 PM
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yea i have the old style headers with the seperate flange per cyl,and these are so worn the bolt holes dont line up and the tubes have expanded to the point the bolts wont even go in
mike

1990 ford f150 5.0
1989 cougar xr-7 5spd 5.0 --249hp/[email protected]
stock bottom end 200k plus miles,afr165 heads,explorer intake,75mm tb,80mm maf,e-cam,30lbs injecters,mac 1 5/8 long tubes,homebuilt foreward manual transbrake aod,3.73 gears,welded open diff,100 zex wet shot
1989 mustang gt [email protected]
1984 tbird 5.0 auto
1999 chevy tracker...wtf!!!!!
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