The SPC Performance Audi B9 upper control arm (front left and right pair) is a forged aluminum adjustable arm that adjusts front camber and caster by +-1.5deg on the Audi B9 platform, with OE style booted ball joints.
Part number: 81383
Adjust front camber and caster +-1.5deg on the Audi B9 platform with these forged aluminum adjustable control arms from SPC. OE style booted ball joints and bonded rubber bushings maintain factory ride, handling and noise, vibration, & harshness (NVH) parameters. Audi's unique multi-link suspension creates a 'Virtual' SAI. The factory does not publish a specification for caster, but SPC recommends 5deg to 6deg of caster as a preferred angle for tracking and return to center on these cars. For the left hand (LH) side, use #81381. For the right hand (RH) side, use part number #81382. Want to be able to adjust both sides? Use part #81383.
Sold as a pair.
Manufacturer data for this part — all visible, no tabs to dig through.
| Brand | SPC Performance |
| Part number | 81383 |
| Shipping carton | 15.4 × 6.7 × 3.4 in (39 × 17 × 8.6 cm) |
| Shipping weight | 3.8 kg (8.4 lb) |
| Category | Suspension & Lift |
More in SPC Performance.
From MapleTorque customers
Awesome Send an email get reply very promptly... Send an other email weekend time ... Also get reply immediately... Alex take care of the customer to make sure everything going good during the transaction... #1 2026 Keep continu...
Quick shipping and very smooth transaction and I will certainly be checking here for future needs
Excellent shopping experience with MapleTorque! Alex was incredibly responsive, friendly, and genuinely committed to customer satisfaction. He personally helped me with pricing, made the purchase process easy, and even followed up after ...
New arrivals, restocks and fitment tips — straight from the counter.
