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Exterior Components› Body Panels and Components

Stillen

Rear Diffuser

Name: Rear Diffuser
Brand: Stillen
SKU: KB12818

$252.33

SKU: KB12818

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

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Beginner — under 30 min

Overview

The STILLEN Rear Diffuser is an exterior accessory designed to visually enhance the rear bumper of the 2016-2018 Nissan Maxima. It features aggressive fins and deep air channels, widening the look of the bumper for a sportier appearance. This diffuser is constructed from durable polyurethane and comes unpainted, ready for custom finishing. Installation is straightforward, utilizing pre-applied 3M automotive tape and including adhesion promoter and screws, with no cutting or modification to the bumper required.

Show original supplier description

The STILLEN Rear Diffuser is meticulously crafted to dramatically improve the visual appearance of your 2016-2018 Nissan Maxima's rear bumper. Its race-inspired design incorporates aggressive fins and deep air channels, providing a wider, sportier stance that highlights the rear of the car. Constructed from durable and resilient polyurethane, this rear diffuser is built for longevity. It comes unpainted, offering a blank canvas for customization. You can choose to prime and paint it to match your vehicle's color, opt for a gloss black finish, or explore other custom options like hydrographics or vinyl wraps to achieve a unique aesthetic. The diffuser installs without requiring any cutting, trimming, or permanent modifications to your Maxima's bumper. The kit includes adhesion promoter and screws for a complete and secure installation. This removable component allows for flexibility and ease of mounting. STILLEN stands behind the quality of this product with 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

Brand	Stillen
Part Number	KB12818
Category	Exterior Components

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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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