ECOTRIC Rear Bumper Diffuser Lip Compatible with 2003-2008 Nissan 350Z Fairlady, J Style PP Rear Lip Diffuser, Under Chin Spoiler Splitter Valance Shark Fin - Carbon Fiber Style

ECOTRIC J-Style Rear Bumper Diffuser Lip – 2003–2008 Nissan 350Z (Carbon Fiber Style)

If the rear of your Z looks a little too smooth underneath, the ECOTRIC J-Style Rear Bumper Diffuser Lip adds the aggressive lower detail it’s missing.

Designed for the Nissan 350Z and Nissan Fairlady Z (2003–2008), this PP rear diffuser lip features a shark fin-inspired design with a carbon fiber style finish for that clean, motorsport look.

FEATURE: Material: High Quality Polypropylene. Carbon Fiber Printing Finish. May Require Sanding/Prepping/Primer Before Paint Job. Note: Heating Up the Piece Maybe Needed For Better Fitment

FITMENT: Compatible with 2003-2007 Nissan 350z. Will Not Fit Nismo Models. Direct replacements for previous Rear Bumper Lip. Reinforced from the old GM design

HEAVY DUTY: Made of Light Weight & Top-Grade Durable PP Plastic. Built to strict quality control standards. Will dramatically improve the sporty appearance for your vehicle

PACKAGE: 1 x Rear Bumper Lip. (Installation Hardware not Included – Reuse Factory Hardware.) Will reduce the airflow into the bottom from both sides of the car, improve the steady of vehicle during fast driving

INSTALLATION: Drilling required. Professional Installation Is Highly Recommended. Instructions NOT included

What a Rear Diffuser Lip Does

While not a full functional race diffuser, this under-chin style valance:

Enhances lower rear bumper styling
Adds visual depth and width
Complements aftermarket exhaust setups
Creates a more track-inspired rear profile

It’s one of those mods that makes the car look lower and more planted—even standing still.

What’s in the box

Rear Bumper Lip

Key Features

J-Style design
Carbon fiber style finish
Durable PP (polypropylene) construction
Flexible and impact-resistant material
Shark fin lower profile styling
Designed for OEM rear bumper fitment

Translation: aggressive look without fiberglass cracking the first time you park too close.

Why PP Material Matters

Polypropylene offers:

Better flexibility than fiberglass
Reduced cracking risk
Improved durability for daily driving
OEM-like resilience

Because rear bumpers live a hard life.

Vehicle Compatibility

Nissan 350Z / Fairlady Z (Z33) – 2003–2008
Coupe models
Designed to fit factory rear bumper

⚠️ Professional installation recommended for best alignment and finish.

Styling Impact

Works perfectly with trunk spoilers and side skirts
Enhances dual exhaust setups
Adds subtle JDM aggression
Completes OEM+ or show builds

It’s not over-the-top—but it definitely changes the vibe.

MATERIAL

Made of high quality PU Polyurethane

STYLE 1 SURFACE FINISH

Unpainted Black Finish.

HEAVY DUTY

Made of Light Weight & Top-Grade Durable Material, dramatically Improving The Sporty Appearance For Your vehicle.Made of high quality PU Polyurethane

STYLE 2 SURFACE FINISH

Unpainted Black Finish.The color scheme on the surface of this lip looks like carbon fiber, but it is made of high quality PU Polyurethane.

Final Verdict

If your 350Z rear end needs a sharper, more performance-oriented look, the ECOTRIC J-Style Rear Diffuser Lip delivers clean aggression with durable PP construction.

Because the Z33 deserves more than a plain bumper.

Specification: ECOTRIC Rear Bumper Diffuser Lip Compatible with 2003-2008 Nissan 350Z Fairlady, J Style PP Rear Lip Diffuser, Under Chin Spoiler Splitter Valance Shark Fin – Carbon Fiber Style

Auto Part Position	‎Rear Lower
Installation Type	‎Bolt-On
Model	‎ET-049-CB
Item Weight	‎4.04 pounds
Package Dimensions	‎43 x 9.75 x 4.5 inches
Item model number	‎ET-049-CB
Manufacturer Part Number	‎ET-049-CB
ASIN ‏	B08LCTGP6Q
Date First Available	October 19, 2020
Manufacturer	‎ECOTRIC
Color	‎Carbon Fiber Style

Dimensions

Weight	1.832512 kg
Dimensions	109.22 × 24.765 × 11.43 cm

10 reviews for ECOTRIC Rear Bumper Diffuser Lip Compatible with 2003-2008 Nissan 350Z Fairlady, J Style PP Rear Lip Diffuser, Under Chin Spoiler Splitter Valance Shark Fin – Carbon Fiber Style

3.8 out of 5

★★★★★

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★★★★★

KASHAKA – October 19, 2023

This product was GREAT,PRICE,QUALITY AND EASY INSTALL 2006 350Z CONVERTABLE

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★★★★★

Nestor Otero – August 14, 2021

Everything fine with the item and the delivery was incredible fast!!!! Totally happy with this business!!! The adhesion it’s perfect just fit in the right way

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★★★★★

Alli – May 16, 2023

easy to install and looks good

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★★★★★

Frezia – April 2, 2021

Didn’t cost me much and it’s perfect for my car 😍 2007 ,350z

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★★★★★

Melissa Cordova – May 7, 2025

Does not have any mounting points. The backside is hollow and has no points for screws and the edges on the bottom are not sufficient for double sided tape.

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★★★★★

kentw – April 2, 2025

Looks pretty good but it doesn’t fit my 2006 350z. There is about a 1/4” gap on both sides so it doesn’t attach cleanly to the bumper

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★★★★★

Blake Stewart – August 30, 2020

For the price it’s a nice add on to any Z, I used three strips of 3m auto tape and put screws on the bottom. Good fit, did not need to heat up to apply.

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★★★★★

coreytrini – August 27, 2022

Looks to be quality part but item was clearly used and damaged no problem for me because I plan on painting it.

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★★★★★

Infinite Shadoe – July 7, 2025

You gotta drill your own holes
It looks great, but does NOT come pre-drilled, so wherever you decide to attach it to your car, it will become evident (See photos). Nonetheless, husband doesnt seem to mind and its stayed on good for a few months now without issue. Fit on his 2003 350z.

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★★★★★

佐々木真一 – March 12, 2023

リアデュフザ－
製品的なはしっかりしていて良かった。加工が必要のためビスの選択が重要です。

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ECOTRIC Rear Bumper Diffuser Lip Compatible with 2003-2008 Nissan 350Z Fairlady, J Style PP Rear Lip Diffuser, Under Chin Spoiler Splitter Valance Shark Fin – Carbon Fiber Style