Jegs Torque arm
http://www.jegs.com/i/Jegster/550/40097/10002/-1
Spend a little extra and get a good brand.
ls1speed.com has UMI tunnel mounted arms for $368 shipped. Transmission mounted ones for $274 shipped.
Also, they would be easier to install than ripping out your interior and drilling a billion little holes to bolt up that Jeg's arm.

the shorter tq arm design is more oriented for drag racing, and shocks the tires more when launching IIRC, that is the verdict with the drag guys i know
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http://www.jegs.com/i/Jegster/550/40097/10002/-1
I noticed that you are interested in a aftermarket Torque Arm! Well I just figured that I would throw this out there for you that we have a few to choose from weather a stock length adjustable or a tunnel mounted adjustable. Below is a link to show you what we have to offer. And if you have any other questions feel free to ask and I will be glad to help!
http://umiperformance.com/products.php?category_id=130
Thanks Again
Brad


