Originally Posted by HP Autowerks
HP Autowerks, Inc. E82/E9X adjustable rear toe arms. These arms allow for greater toe adjustment for vehicles that have lowered on coilover suspension. For E82/E9X owners with just lowering springs, these are not a necessary requirement.
How Low Can You Go?
When an E82/E9X is lowered beyond the limits of just lowering springs, the rear wheels toe-in excessively. This excessive rear toe can cause increased tire wear (faster than more camber). As an example, here are the specifications for the E9X M3.
Factory Toe Specs Value
On a recent install of coilovers, we discovered that the toe of the rear wheels had an incurable +0.81 left and right toe. Unfortunately, with the stock toe arms, we could not dial out the toe. Therefore, creating a strong, more adjustable part was in order.
For standard spring-only suspension installs, there is enough adjustment in the factory toe arms to bring them back into spec.
The Right to Bear (Stronger) Arms
The sophisticated (and some say complicated) rear suspension of the current E82/E9X will undoubtedly be replicated by many other companies in the future. However, for those of us in the aftermarket, we're still learning about the little quirks of the suspension. By applying our experience with our E36 and E46 suspension components, we have built arms that are strong and lightweight, while serving the needs of the rear suspension adjustments.
Our rear control arms are made from the highest quality components, from USA.
Available in black anodized, an exclusive from HP Autowerks, Inc. Also available in HP blue(2 weeks lead time for anodizing).
*100% machined and anodized, 6061-T6 lightweight aluminum arms
*High-strength, 3 piece, rod end (with carbon fiber reinforced, PTFE race)
offers longer life for street compared to standard rod ends
*Seals-it Rod End Seals keep dirt, water and other contaminants out (effective
item to extend the life of the rod end!)
*Lighter than stock! (Stock is 875g, HP arms are 640g)
*Extremely easy installation and adjustment (your alignment shop will LOVE
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JB4 G5, 455 LPFP, HFS-4 meth kit, BMS OCC, Motiv 750 ST, RB valve, BMS DCI, 3" AR Dps, Custom OC W/ SS lines, ER FMIC, ER CP W/HKS BOV, M3 control arms, M3 guide rods, M3 upper links, M3 front & rear sway-bars, HPA rear toe arms, Wavetrac LSD, HPF Gen 2 exhaust DEFIV kit, KW clubsport, Delrin solid subframe bushings, stoptech rotors, Rogue Tranny Mounts, 1M bumper, M3 CF hood, MORR VS8.2 rims 245/295