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boxed vs tubular subframe connectors

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Old 01-25-2009, 12:44 PM
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01z
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Default boxed vs tubular subframe connectors

im just wondering what everybody is running and why.

on my z28 i had tubular SFCs. i just picked up a 99 ta thats basically stock so im about to start ordering crap for it

i think this time im going to get boxed, just cuz i had tubular on my last car. i dont think it makes much of a difference.
Old 01-25-2009, 12:52 PM
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Mine are tubular, don't really know if theres a difference, just what I ended getting.
Old 01-25-2009, 12:53 PM
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Strength wise they are probably the same, seems like the tubular offer a little better ground clearance as they are more formed to the under side of the car from pics I have seen of installs. As for the boxed that is what I have on my own car and what I have installed for others makes adding suspension mods such as a weld in torque arm much easier and can also be tied into floor plates should you ever decide to have a full cage put in the car later on.
Old 01-25-2009, 07:45 PM
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whoever put none, needs to sell their fbody asap
Old 01-25-2009, 08:22 PM
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im not going to vote because idk myself. id like to do some this spring. id imagine boxed to be abit stronger but the tubular ones (everyons says) tuck up better. either which way there better then Not having them
Old 01-25-2009, 08:30 PM
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Default Umi

I ended up getting rid of my BMR's and bought a set of the UMI 3 point bolt in's and welded !! and installed the UMI tunnel brace after which helped tied everything in together The SS is so much tighter now !
Old 01-25-2009, 10:16 PM
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Welded in UMI boxed ones here. They make a big difference.
Old 01-25-2009, 10:24 PM
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Originally Posted by ThoR294
whoever put none, needs to sell their fbody asap
i put none just cuz i dont have them yet , lol
Old 01-25-2009, 10:55 PM
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ya, that should be your next mod. if you dont have SFCs and you start putting more power than stock and launch it, youll twist the car (t-top/vert)
Old 01-25-2009, 11:05 PM
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Mine are boxed, custom made and welded in by a local guy. I don't know if there's a difference between the two or not, but there is a huge difference between an Fbody with them and one with out. Take the advice of everyone here and get them on your car. You'll be glad you did!
Old 01-26-2009, 07:39 AM
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put none on accident. i run the welded boxed ones just for piece of mind, and i like that i can see the red under my car a little
Old 01-26-2009, 07:44 AM
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I need to get some asap.....I hear they make a good spot to jack up the car
Old 01-26-2009, 07:57 AM
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Default SFC's

Originally Posted by barnat
I ended up getting rid of my BMR's and bought a set of the UMI 3 point bolt in's and welded !! and installed the UMI tunnel brace after which helped tied everything in together The SS is so much tighter now !
Hello,

Thanks and we are glad that you are happy with our product. There are alot of people that are worried about the weight between tubular and boxed SFC's but when you are looking for solidness, I would recommend tubular. If you have any other questions or problem feel free to ask. Just some food for thought!

http://umiperformance.com/products.php?category_id=129

Thanks Again,
Brad
Old 01-26-2009, 01:11 PM
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Originally Posted by ThoR294
ya, that should be your next mod. if you dont have SFCs and you start putting more power than stock and launch it, youll twist the car (t-top/vert)
yah im ordering some weld in SFC's next payday.
Old 01-26-2009, 04:16 PM
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Originally Posted by ThoR294
ya, that should be your next mod. if you dont have SFCs and you start putting more power than stock and launch it, youll twist the car (t-top/vert)
Your car definitely isn't going to die if you don't have SFC's. I don't see how you could twist the car that badly unless you had slicks and some good launching hardware in the car. The car is fairly rigid compared to like the 3rd gen. For many years, people have been autoxing in stock and street prepared classes with no SFCs. Recently though street prepared began allowing SFCs which is nice.

For drag racing, yeah I'd probably want to get some good SFCs especially if the setup was causing the car not to leave too straight.
Old 01-26-2009, 11:15 PM
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none
Old 01-26-2009, 11:53 PM
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I personally prefer boxed only because they can be used as jacking rails unlike tubular. Other than that there isn't really much difference except weight.
Old 01-28-2009, 04:20 PM
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Ive heard stories of cars twisted due to no SFCs and hard launches, close to stock :\
Old 01-28-2009, 04:28 PM
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Originally Posted by ThoR294
Ive heard stories of cars twisted due to no SFCs and hard launches, close to stock :\
You heard wrong...
Old 01-29-2009, 08:14 AM
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I have tubular BMRs. Cant see them at all from the side and they made a noticable difference.


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