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Exterior Components› Body Panels and Components

STILLEN

Rear Diffuser

$395.00 $356.67 Save $38.33

SKU: KB12846MB

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

The STILLEN Rear Diffuser is an exterior styling enhancement for the 2019-2021 Nissan Maxima. This diffuser widens the look of the rear bumper for a sportier appearance.

Constructed from durable polyurethane, the diffuser comes in a painted matte black finish. It includes pre-installed 3M automotive tape, adhesion promoter, and screws for installation. The design allows for installation without cutting or modification to the bumper and is removable. The product is backed by a Limited Lifetime Warranty.
Show original supplier description
The STILLEN Rear Diffuser is an exterior styling upgrade specifically designed for the 2019-2021 Nissan Maxima. This accessory aims to dramatically improve the visual appearance of the rear bumper, giving the car a more aggressive, race-inspired look. Its design incorporates aggressive fins and deep air channels, widening the visual stance of the rear and adding a sporty aesthetic that draws attention to the rear of the car and complements the factory exhaust. Crafted from durable and resilient polyurethane, this rear diffuser is offered in a pre-painted matte black finish, ready for immediate installation. The product features a straightforward installation process, utilizing genuine 3M automotive trim foam tape that is pre-installed on the diffuser, similar to OEM applications. The kit also includes an adhesion promoter and screws for a secure fit. Notably, the design ensures no cutting or modification to the bumper is required, and the diffuser is removable. Beyond its aesthetic enhancements, the STILLEN Rear Diffuser contributes to a performance-oriented appearance. The quality construction from sturdy polyurethane ensures durability, while the easy installation process, highlighted by customer reviews, adds significant value. The product is further supported by a Limited Lifetime Warranty, offering peace of mind to the owner.

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

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Specifications

BrandSTILLEN
Part NumberKB12846MB
CategoryExterior Components
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(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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