Sale

RS-R

Best-i Active Coilovers with 36-Way Adjustability

$2,399.00 $2,185.60 Save $213.40

SKU: XBIT591MA

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The RS-R Best-i Active Coilovers are engineered to enhance the driving experience of your 2021 Lexus IS350 F Sport RWD, offering a significant improvement in handling performance and a lowered aesthetic. This integration ensures that the factory actuator and its associated damping and control functions remain fully operational. This means you can adjust your suspension settings using your car's original controls, maintaining the convenience and sophistication of the factory setup while benefiting from performance coilovers. The coilovers provide extensive adjustability for ride height and damping. They offer a maximum front height adjustment range from +15mm to -95mm (+0.6in to -3.8in) and a rear range from -10mm to -60mm (-0.4in to -2.4in). The front springs have a rate of 8.00kg/mm, and the rear springs are rated at 7.00kg/mm. With 36-way adjustable damping, you can fine-tune the ride to your preference. Each kit includes one complete coilover set and is backed by RS-R's Limited Manufacturer's Warranty. Installation of these coilovers is recommended for vehicles equipped with the factory Dynamic Digital Suspension system.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandRS-R
Part NumberXBIT591MA
CategorySuspension and Components

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

View Full Shipping Policy