SPL Parts Front Lower Control Arms For F3X BMW 3 / 4 Series

The SPL BMW F2X/F3X Front Lower Control Arms (FLCA) provide roll center, camber, and track width adjustment for the rear wheel drive (RWD) F2X/F3X BMWs while eliminating bushing deflection resulting in sharpened steering response and driving precision.

Negative Camber Benefits

The ability to run more negative camber greatly improves the peak lateral grip available. Adding negative camber results in the tire having an optimal contact patch as the body rolls due to cornering forces. This is especially important with better tires and a must-have for anyone looking to prevent excessive outer shoulder wear (and heating) on their tires due to a lack of camber.

Wider Front Track Width Benefits

Further handling improvements can be had by increasing the front track width from the factory 60.5" (F3X) or 59.9" (F2X) to be closer to the M3's 62.2". If you applied the M3's width to the M340i it would reduce the outer front tire loading by roughly 20 lbs and apply it to the inner front tire. The result would be greater peak grip (~0.04G), improved stability, and faster lap times.

Roll Center Correction Benefits

Lowering the F2X/F3X results in a greater distance between the front roll center and the center of gravity. This acts like a longer lever, creating more body roll, bumpsteer, and requiring additional static camber angle to maintain the same handling. The SPL front lower control arms allow the roll center to be corrected for a wide range of ride heights to improve handling and stability.

The lower control arms come with a ride height sensor bracket to maintain factory ride height sensor location, regardless of length of the arm to keep those finicky BMW chassis electronics happy.

Benefits

• Adjustable Camber, Roll Center, and Track Width
• Eliminates Bushing Deflection
• Improved Tire Life with Ideal Camber Settings
• Lightweight, High-Strength Construction
• Stackable 304SS Roll Center Spacers in 1/8" and 1/4" Sizes
• US Made, PTFE Lined FK Rod Ends 

Materials

• 6061-T6 aluminum black anodized arm, clamps, and spacers
• 4130 CrMo electroless nickel plated double adjuster
• Ti6Al4V titanium socket head cap screws
• 304 stainless steel roll center and knuckle spacers
• 5/8" 4140 CrMo stud
• FK PTFE-lined spherical bearings (F1 spec, self-cleaning)