Official Thayer Motorsports E39 Adjustable Rear Contorol Arm Thread

Now that we are an official bf.c supporting vendor, I wanted to start a thread with information on our new adjustable rear control arms for the E39.





Click to view on our webpage







This post will include info on these arms and some FAQ's. Please feel free to ask any other questions you may have, and if you purchase a set, please post your photos and share your experience with them!





Basic info:



DOM steel tube construction

.250" (6.5mm) wall on upper arms

.120"(3mm) wall on toe adjustment arms

Tig welded



QA1 High Performance Rod Ends

"X" series aramid/PTFE lined heim joints



Energy Suspension Polyurethane Bushings



Stainless Spacers

Custom machined billet spacers made from 304 stainless



Hardware

Class 10.9 metric hardware

Yellow Zink coated bolts/washers

Zink plated lock nuts with nylon inserts



Black Epoxy Coated



Adjustability

Up to 9 degrees of camber adjustment

Bring your lowered car back into factory alignment specs

Add additional negative camber to fit more aggressive wheel/tire combos

Dial in the perfect alignment for traction on your high HP car





Bottom line, this product offers more adjustability and reliability than the adjustable bushings on the market now. When these arms get set, they stay set. No amount of hard driving or pothole hitting will knock them out of alignment.



FAQ:


Q: How long will the heim joints last?

A: Life expectancy of the QA1 high performance rod ends will vary. Things like climate and driving style will alter their life. The "X" series rod ends that we chose are the same rod ends that QA1 uses on the street/strip control arms that they offer. No they will not have the life of a factory ball joint. These pieces will far out perform the factory arms, and like any high performance product, will require more attention than a stock part.



Q: When will there be a group buy?

A: At this time we aren't planning a group buy. This is a new product to the market and our number one goal is to provide a quality performance part, not see how many we can sell.



Q: Are these arms as strong as the factory parts?

A: Short answer, yes.

Long answer, the stock arms are cast aluminum with pressed in bushings/balljoints. Cast aluminum can be porous and weak. Some people have asked if DOM tube welded together is as strong as a one piece arm. Think about roll cages or 4 link bars. Some of the strongest structures in motorsports are welded tube. The QA1 rod ends are made for high performance suspension use, this is what they were designed to do. The heims on the upper arms have a 45,000lb load rating, the heims on the toe adjusters have a 18,000lb load rating. These parts are overkill!



Q: Why are they so expensive?

A: In the world of adjustable control arms, they aren't. We have picked out the highest quality parts to put into this product, doing so causes production costs to be high. We have no intentions of releasing an "eBay" quality product, using the cheapest parts we can to make an inexpensive product. Adjustable bushings that are available will run you anywhere from $175-$399. Figure in the price of having to get the car realigned numerous times to get it back into spec and you could have bought these and likely saved money. If your factory arms are worn out, replacing them with these is actually cheaper than replacing them with OEM parts. They are only marginally more expensive than good quality aftermarket replacements.



Q: Are these serviceable?

A: Absolutely. Although it hasn't made it on our new website yet, there is a complete service kit available through us. The kit comes with two new polyurethane bushings and two new QA1 heim joints for the upper arms. Two left hand threaded and two right hand threaded QA1 heim joints for the toe adjusters are also included. The service kit will retail for $189, individual parts are also available.



Q: How do these get adjusted? Does the alignment shop have to remove the rear wheels?

A: When you receive these, they will be set very similar to stock length arms. If your car was stock height, or you were already happy with your alignment before replacing your old arms, they can be installed as is. These arms work in conjunction with the stock eccentric bolts, because of this, the alignment shop will make their adjustments with those. If you are using the arms to correct or add negative camber, installing them as they come will require the rear wheels to be removed while being aligned. An option here is to get the arms as close as possible to the proper length before you go to the alignment shop. Using a simple angle finder, or even doing it by eye will get you in the ballpark. Taking a little time to eyeball it and get things close will eliminate the need to remove the rear wheels during alignment.



Q: Are these available now?

A: We are working to fill our current orders. We expect to be able to fill those and have stock for new orders the week of 2/23.







Thanks for checking out our product and please visit our website, http://ift.tt/1D4YhPo to view other products we offer. Watch for more E39 goodies in the near future!



Like us on facebook: http://ift.tt/174lrY6

Follow us on Instagram: @thayer_motorsports

Official Thayer Motorsports E39 Adjustable Rear Contorol Arm Thread