2020-2027 Corvette C8 Z51 Stingray - 2-Piece Gloss Black Rear Bumper Diffuser Spoiler
Product Features
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Aggressive Track-Inspired Styling: Features an aggressive 2-piece lower diffuser fin design that extends the lower bumper contours, instantly giving your C8 Stingray a lower, motorsport-grade stance.
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Functional Airflow Management: Sculpted channels guide turbulent underbody air as it exits the rear of the vehicle, reducing aerodynamic drag and helping stabilize the rear end at highway speeds.
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Premium High-Impact ABS Construction: Manufactured from durable, automotive-grade ABS plastic engineered to withstand exhaust heat, road debris, and daily driving hazards without warping or cracking.
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UV-Resistant High-Gloss Black Finish: Coated in a deep, mirror-like gloss black finish with integrated UV protection to resist sun-fading, oxidation, and clear coat yellowing over time.
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Precision C8 Digital Fitment: Molded from 3D digital scans of the Corvette C8 rear valence to ensure flush alignment with the factory bumper lines and lower exhaust tunnel channels.
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Seamless OEM+ Integration: Designed to frame the factory dual-outlet exhaust surrounds, complementing existing rear spoilers and aerodynamic packages for a cohesive, supercar aesthetic.

Specifications
| Feature |
Specification |
| Material |
High-Grade Impact-Resistant ABS Plastic |
| Finish |
High-Gloss Black (UV-Protected) |
| Placement |
Rear Bumper Lower Valence (Left & Right Pair) |
| Styling |
Aerodynamic Motorsport 2-Piece Diffuser Fins |
| Compatibility |
Chevrolet Corvette C8 Stingray / Z51 (2020-2027) |
Frequently Asked Questions
Will this fit wide-body C8 models such as the Z06 or E-Ray?
No, this 2-piece diffuser spoiler set is engineered specifically to match the rear bumper valence geometry and exhaust spacing of the standard C8 Stingray and Z51 models.
Is this a full replacement lower bumper or an add-on fin kit?
This is a 2-piece aerodynamic add-on fin extension kit designed to mount cleanly onto the lower section of your factory rear diffuser valence.
Does this part work with aftermarket exhaust systems?
Yes, it is contoured along the lower underbody lines and maintains proper clearance around standard-placement dual and quad exhaust tips.
Installation
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Installation instructions are NOT included; professional installation is strongly recommended. (You may message us for general installation questions, but we do not take responsibility for teaching buyers how to install).
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This is an aftermarket, DIY (Do It Yourself) upgrade item. Any damage sustained during or after installation will not be eligible for a refund.
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Direct install upgrade part; minor drilling may be required to properly secure the component.
RETURN POLICY
THERE ARE 2 KINDS OF RETURN CASES
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WHAT KIND OF RETURN CAN BE RECOGNIZED AS NON-DEFECTIVE RETURN?
Superautousa ships out right product as product link displayed, and customer want to return:
Customers order wrong product for their car
Customers don’t like the product on personal reason
Customers request return after using or installing the product
Incorrect or mistakenly installation of a product
IMPORTANT NOTICE FOR NON-DEFECTIVE RETURN
If a customer received the wrong product, the customer needs to send an email to info@superautousa.com in 30 days of the item delivery; Otherwise, no return & replacement/refund will be provided from Superautousa.
If a customer received a damaged product, the customer needs to send an email to info@superautousa.com in 72 Hours of the item delivery. Otherwise, no return/replacement/refund will be provided from Superautousa.
Return items must be in the original package box, the products need to be in unused & good condition(in the same condition that you received it). Customers need to send pictures of the shipping labels on the package and the pictures of the product in full view to confirm the condition.
Return address will be provided by Superautousa after non-defective return authorized.
There will be a restocking fee (20% of the order's original purchase price) deducted from the refund for non-defective return.
If Superautousa receives the return item in damaged condition, there will be 50% of the order amount deducted from the refund, we highly recommend customers to purchase package protection/insurance.
IF THE RETURN IS CAUSED BY THE CONSUMER (NON-DEFECTIVE RETURN), CONSUMERS ARE RESPONSIBLE FOR THE SHIPPING FEE. THE SPECIFIC FEE SHOULD BE BASED ON THE EXPRESS COMPANY YOU CHOOSE.
WHAT KIND OF RETURN IS DUE Superautousa?
Superautousa sends the wrong product which is different from the product customer ordered, Superautousa will provide the correct product according to customers’ intention.
Customers receive damaged products, Superautousa will provide replacements.
Customers receive a product that's missing contents, Superautousa will provide replacements.
IMPORTANT NOTICE FOR ALL RETURN/REFUND REQUEST
Customers need to send an email to info@superautousa.com in 30 days of the item delivery; Otherwise, no return & replacement/refund will be provided from Superautousa.
If a customer received a damaged product, the customer needs to send an email to info@superautousa.com in 72 Hours of delivery. Otherwise, no return/replacement/refund will be provided from Superautousa.
Customers need to feedback the product quality/defective issue once they receive it in 72 Hours. If customer feedback the item issue after installation, this kind of request is not acceptable, Superautousa won't provide return and refund on that order.
Customer need to send pictures in emails, Superautousa will recognize the return reason/confirm the issue(Please send the fitment issue with the required pictures/informations within 10 days after Superautousa send you email to require that/tips as suggested, otherwise the return request will be closed on our end)
Email content include:
- Return Reason
- Detail information of your car and pictures of the car (for fitment issue confirmation)
- Pictures of the fitment issue area, and full test install (for fitment issue confirmation)
- Pictures of the front look and back view of the products in full view(product condition confirmation)
- Pictures of the all shipping labels in the package box
- Picture of damage area of the product (If damaged product received)
Return package without authorization by Superautousa is not acceptable, no replacement or refund will be provided for unauthorized return. Thank you for your understanding!
Orders which have been shipped out and still in transit/shipment cannot be canceled, returned or refunded. Customers need to apply for the return or refund after they receive the products.
For customers with shipping protection, please keep All Packaging and Damaged Goods When filing a claim, keep all packaging and the damaged goods as they were received, as photographs may be required for claims processing. Do not dispose of any shipment materials or goods before the claim is complete.
Exchanges
If a customer wishes to exchange for another item, the customer needs to contact info@superautousa.com to request for the exchange. The customer needs to pay for the price difference (if apply) and pay for the shipping cost. Superautousa will refund the price difference (if apply) once the exchange request is accepted.
Order Cancellation
If cancel reason is on Superautousa, we will provide a full refund. The refund is expected to be received in 5 to 7 business days upon notifying.
Superautousa accepts all cancellations before fulfillment.
Orders which have been shipped out cannot be canceled, please check if you need to apply the return.
Shipping Fee& Package Shipping Insurance Fee is not refundable.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved. If the product is returned in damaged, used or defective condition, a 50% restocking fee will apply. If the reason for returning is not due Superautousa, a 20% restocking fee will apply. If none of the above conditions apply, you will receive a full refund. Please remember it can take some time for your bank or credit card company to process and post the refund too.
If you have not received your refund for more than 15 business days after we’ve approved your return, please contact us at info@superautousa.com.