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Trailing arms
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TeenBeach
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PostPosted: Tue Jan 24, 2012 2:22 am    Post subject: Question Trailing arms Reply with quote

Time to do some part buying so I have plenty of stuff to do when late spring rolls around. My main focus will be the suspension, as I believe it is a major support modification in whole. If you wanna go fast, you need to corner well and brake hard Wink

I've been looking at trailing arms as my second suspension purchase, first was all 4 timken hubs.

Basicly, I need help figuring out which is the best to buy. I want only the best for my impy ofcourse Smile Price is not a issue. I've done some research and this is what i've gathered. I'll be getting them powdercoated, along with everything else suspension wise.

ZZP Performance $119.99
_____________________
1" Tubing
Poly Bushings
Not Greasable Thumb Down
Weight per arm is unknown, but they say they are apparently the best in the market. (I feel like they are just saying that)
Material is 4340 Chromoly

HT Motorsports $ ??????
_____________________
1" Tubing
Energy Suspension Poly Bushings
Steel Sleeves
Drilled/Fitted Greasable Fittings
Weight is 8 pounds per arm
Material is Steel

W-Body Store $49
_____________________
All I know that it is made of steel. Also it is a box shape? Is there any difference
in comparision with boxed vs. tubular? Doing some research on the forum, they come shipped with a Dorman sticker. I suppose this is true because of the price,
compared to the other aftermarket ones.

EDIT: Just got a email from them saying it is 1" thick, they are guessing 9 to 10 pounds each arm. I asked them if they have poly bushings with grease fittings and they said: No, these are intended to be a heavier duty stock replacement.  There's not a lot of benefit to using poly bushings for this particular arm.

BMR Suspension $129.95
_____________________
1.5" Tube
Fluted Poly Bushings
Greasable Fittings
Weight per arm is unkown
Unknown material

These are all the aftermarket trailing arms I could find, I know of the GMPP but they are discontinued. Also, the replacement ones such as Dorman, Raybesto, MOOG, ACdeclo, ect... doesn't seem the right way to go if i want performance handling.

So obviously poly bushing and greasable fittings seem like a right way to go. Is lighter better.. is bigger the tubing better? Also, wtf is with the "boxed" arm?

Thank you for your help in advance! Very Happy
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Killr68
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PostPosted: Tue Jan 24, 2012 11:54 am    Post subject:   Reply with quote

you should still be able to get the GMPP parts from ZSPOT, just send him a PM, or he may chime in...
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IffyG
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PostPosted: Tue Jan 24, 2012 12:08 pm    Post subject:   Reply with quote

I believe the GMPP trailing arms have been discontinued. That being said, I'd just go with the cheaper boxed trailing arm. Anything is better than the stamped metal trailing arm on the car now (you can flex it with your hands when it's off the car). I'm also pretty sure that a boxed trailing arm is what is on the Impala now. Either way it's a relatively minor gain compared to adding stiffer sway bars and a rear STB to the car.

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Killr68
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PostPosted: Tue Jan 24, 2012 12:10 pm    Post subject:   Reply with quote

the actual GMPP kit had been discontinued, but I thought the ones for the 06+ were being used...I may be wrong though.
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IffyG
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PostPosted: Tue Jan 24, 2012 12:11 pm    Post subject:   Reply with quote

You are correct on both counts. The tubular GMPP parts are no longer available, but you can use the boxed 06+ parts as a direct fit upgrade.

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Killr68
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PostPosted: Tue Jan 24, 2012 12:13 pm    Post subject:   Reply with quote

IffyG wrote:
You are correct on both counts.


Yay, I like being right and it is becoming a less frequent occurence
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gopedxr7
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PostPosted: Tue Jan 24, 2012 12:39 pm    Post subject:   Reply with quote

the boxed ones sound like the ones that were put on the Grand Prix GXP and Impala SS models

Alan

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outonthetiles
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PostPosted: Tue Jan 24, 2012 1:11 pm    Post subject:   Reply with quote

I have WBS trailing arms on my imp, if I were to do it again I would go with Dorman part #905501 from rockauto.com, they're 12.15 a piece, and I'm convinced they're the exact same thing as WBS.

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TeenBeach
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PostPosted: Tue Jan 24, 2012 1:29 pm    Post subject:   Reply with quote

Yeah, if i could get my hands on the gmpp that would be great but it would be pretty rare to find them. So it seems like the majority of people go with the boxed design... So there would really be no point of getting the higher priced ones? I would think that a thicker tube, and poly bushings would be a great benefit. I know it wouldnt be the biggest in suspension upgrades, but eventually it will all add up when I buy the other parts. Yeah, I saw those on rockauto and that's definetly the way I would go if I buy dorman. I just want to do things right the first time, yah know?
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IffyG
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PostPosted: Tue Jan 24, 2012 1:48 pm    Post subject:   Reply with quote

It's your money to burn, but I'd think you are better off getting cheap boxed arms and a rear STB and bracket...

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ZSPOT
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PostPosted: Tue Jan 24, 2012 2:01 pm    Post subject:   Reply with quote

Yeah, the Dorman ones are just a cheap knock off of the GM arms on the stiffer suspension models. Not too sure of the quality difference, but the GM ones are about $50 a pair.

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PostPosted: Tue Jan 24, 2012 7:33 pm    Post subject:   Reply with quote

Take a look at Olds Intrigue trailing arms too, if BMR prices scare you away.

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barnettimpala
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PostPosted: Sun Feb 05, 2012 7:17 pm    Post subject:   Reply with quote

So everyone has come to a conclusion that the dorman ones from rockauto would be best?

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PostPosted: Sun Feb 05, 2012 7:20 pm    Post subject:   Reply with quote

Not the absolute best, but certainly the best bang/buck as far as I'm concerned. I bought the WBS ones and I wish I would've saved the $ and went with the dormans.

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PostPosted: Sun Feb 05, 2012 8:43 pm    Post subject:   Reply with quote

Dan wrote:
Take a look at Olds Intrigue trailing arms too, if BMR prices scare you away.


Intrigues had tubular ones?

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