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Exterior Components› Body Panels and Components

Stillen

Rear Diffuser, Polyurethane

$425.67 $252.00 Save $173.67

SKU: KB11222

Out of Stock
In Stock
Ships by Oct 12
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

It features an aerodynamic, race-car inspired design with aggressive strakes to give your car a sophisticated and sporty look. This diffuser is made from durable polyurethane construction, offering strength for daily street use.
Show original supplier description
The Stillen Rear Diffuser is a body styling upgrade meticulously designed to enhance the rear-end aesthetics of your Infiniti Q50 sedan. Its aerodynamic, race-car inspired design incorporates aggressive strakes, evoking a 'JGTC' racer aesthetic that is sure to turn heads. This diffuser transforms a standard rear end into a sophisticated and sporty visual statement. Constructed from durable polyurethane, this rear diffuser offers the strength needed to withstand the rigors of daily street driving. It is designed and manufactured in-house by STILLEN, with multiple inspections to ensure the highest standards of quality and fitment. The oversized exhaust cutouts are strategically placed to accentuate your exhaust system, making it an ideal complement to a STILLEN Cat-Back Exhaust. Installation is designed to be straightforward, with the diffuser coming pre-installed with 3M Automotive Tape, similar to OEM applications. It requires no cutting or modification to the original bumper and is fully removable. This particular model comes unpainted, ready for you to prep, prime, and paint to match your desired color scheme. It is backed by a Limited Lifetime Warranty.

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

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Specifications

BrandStillen
Part NumberKB11222
CategoryExterior Components
5,000+ Trusted brands
1M+ Enthusiasts
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(760) 282-4645 hello@motormia.co

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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.

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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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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