Massive warehouse and showroom in Texas. Fast 2 days handling time or free local pick up!
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Questions & Answers
Have a Question?
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When will this be available again?
Hi Jonathan. There are a few people on the paid-wait-list at the moment. If you were to place your order today (2022-11-05), expected wait time is about 1 month.
Description
Upgrade Your Audi S3 A3 S-line (with s-line bumper,does not fit base model) 8Y Pre-facelift 2021-2024 with Aftermarket Parts - Rear Diffuser Carbon Fiber from CMST Tuning
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Upgrade Your Audi S3 A3 S-line (with s-line bumper,does not fit base model) 8Y 2021-ON with Aftermarket Parts - Rear Diffuser Carbon Fiber from CMST Tuning
Product Information
Product InformationSKU CMS16-116C
Category
Rear Diffuser
Installation
Replacement with OEM mounting points, secure with screws or adhesive. (For best results, bumper removal recommended.)
Estimated Installation Hours
2.5 Hours
Pro Install
Recommended
Brand
Package Content
Rear Diffuser x 1 (1 pcs)
Material Options
Vacuumed Carbon:
- Real Vacuumed Carbon Fiber with UV Protection Clearcoat Learn more about materials →
- Real Vacuumed Carbon Fiber with UV Protection Clearcoat Learn more about materials →
Carbon Pattern Options
Woven 3K (default option) / Forged (20% extra charge, made to order) / Honeycomb Carbon (20% extra charge, made to order)
Learn more about carbon patterns →
Finish Options
Gloss Finish (default option) / Matte Finish (10% extra charge, made to order)
Learn more about finishes →
Vehicle Fitment2 vehicles
Audi A3Audi S3
Audi A38Y4 Door Sedan
2021–2024Pre-Facelift
PremiumPremium PlusPrestigeS line bumper
Audi S38Y4 Door Sedan
2021–2024Pre-Facelift
PremiumPremium PlusPrestige
About CMST Tuning
CMST Tuning uses Grade A one-piece carbon fiber sheets with a Fiberglass Reinforced Plastic (FRP) skeleton for strength and durability (except on dry carbon products, since it is not needed). Because CMST Tuning uses one-piece sheets, so you will not see any broken lines or patterns. Rather, all you will notice is just one big consistent weave pattern. In addition to this, all CMST Tuning products use a strong clear coat finish. Clear coats are shiny and durable, and they give you the nice "wet" look as opposed to a duller look from gel coats. Lastly, all of CMST Tuning's carbon sheets are built into the mold, so they do not break and split like the ones where carbon is only wrapped around the skeleton.
Important Information:
-All CMST Tuning products come with a 6-month limited clear coat warranty.
CMST Tuning Parts, unless stated otherwise, may require re-use of some factory parts for a complete installation (for example, trunk lids, hoods for some applications will require re-using the factory license plate garnish)
To avoid pre-mature aging, it is important to keep your carbon fiber product clean. Minimize exposure to the sun, and wax when necessary. This is especially important for dry carbon products, which are sold RAW and need immediate protection upon receipt.
-For hoods, for legal purpose you may need to purchase some hood pins to ensure your new hood stays closed during high-speed or aggressive driving, even if your CMST Tuning hood features built-in latches.
Professional installation is always recommended if you are unsure of your abilities (make sure they check for fitment before starting the install). In some cases, drilling may be required.
-CMST Tuning parts are either made as " Vacuumed " carbon fiber. Wet carbon fiber has a shiny finish and is smooth. or made as "Pre-preg" carbon fiber, is often more pricy but does have a better strength to weight ratio. Pre-preg carbon also has slightly better weave quality, and is less prone to very minor defects.
Carbon fiber doors are strictly for off road and track use only, due to possible safety issues.
Shipping & Return
Return and Exchange Policy
DOMESTIC ORDERS RETURN & EXCHANGE POLICY
Return Periods:
IN STOCK ITEMS* = STORE CREDIT: 48 hours from time of receiving product
MADE TO ORDER/SPECIAL ORDER/CUSTOM MADE ITEMS = STORE CREDIT: subject to approval
* New products must be in original packaging, in new condition, and must not have been installed. If item is used, altered, or damaged in any way, return will be declined.
Return Fees and Shipping:
NEW PRODUCTS* - CORRECT ITEM & FUNCTIONAL: 20% restocking fee + shipping + return shipping + 5.2% transaction fee
NEW PRODUCTS - CORRECT ITEM & DAMAGED ITEM: refund/credit value subject to 3rd party shipping insurance claim. Credit applies towards replacement. Cancellation subject to 20% restocking fee + 5.2% transaction fee.
NEW PRODUCTS - INCORRECT ITEM (CUSTOMER ERROR): 20% restocking fee + shipping + return shipping + 5.2% transaction fee
NEW PRODUCTS - INCORRECT ITEM (MERCHANT ERROR): replacement, must return incorrect or defective item. Subject to lead time for replacement item.
MADE TO ORDER ITEMS: no returns
MADE TO ORDER ITEMS - DEFECTIVE / INCORRECT ITEM (MERCHANT ERROR): replacement, must return incorrect or defective item. Subject to lead time for replacement item.
MADE TO ORDER ITEMS - DAMAGED ITEM: replacement if customer opted in and paid for "PREMIUM SHIPPING PROTECTION" (2% of item's value) during check out. Subject to lead time for replacement item. No replacement or refunds if customer did not opt in and/or pay for "PREMIUM SHIPPING PROTECTION".
INTERNATIONAL ORDERS RETURN & EXCHANGE POLICY
Return Periods:
IN STOCK ITEMS* = STORE CREDIT: no returns
MADE TO ORDER ITEMS = STORE CREDIT: no returns
* New products must be in original packaging, in new condition, and must not have been installed. If item is used, altered, or damaged in any way, return will be declined.
Return Fees and Shipping:
NEW PRODUCTS* - CORRECT ITEM & FUNCTIONAL: 20% restocking fee + shipping + return shipping + 5.2% transaction fee
NEW PRODUCTS - CORRECT ITEM & DAMAGED ITEM: refund/credit value subject to 3rd party shipping insurance claim. Credit applies towards replacement. Cancellation subject to 20% restocking fee + 5.2% transaction fee.
NEW PRODUCTS - INCORRECT ITEM (CUSTOMER ERROR): 20% restocking fee + shipping + return shipping + 5.2% transaction fee
NEW PRODUCTS - INCORRECT ITEM (MERCHANT ERROR): replacement, must return incorrect or defective item. Subject to lead time for replacement item.
MADE TO ORDER ITEMS: no returns
MADE TO ORDER ITEMS - DEFECTIVE / INCORRECT ITEM (MERCHANT ERROR): replacement, must return incorrect or defective item. Subject to lead time for replacement item.
MADE TO ORDER ITEMS - DAMAGED ITEM: replacement if customer opted in and paid for "PREMIUM SHIPPING PROTECTION" (2% of item's value) during check out. Subject to lead time for replacement item. No replacement or refunds if customer did not opt in and/or pay for "PREMIUM SHIPPING PROTECTION".
Damaged Items & Lost Packages
Merchant provides shipping insurance ONLY if customer opts-in for "PREMIUM SHIPPING PROTECTION". Protection covers items for damage during transit. For insurance to be valid, please do make sure to CHECK FOR SHIPPING DAMAGE "ON THE SPOT" while delivery driver is on site. Otherwise, your claim will be DECLINED. If there is shipping damage, let the delivery driver MARK DOWN the damage ON THE SPOT (please make sure to take photos and keep the box) and REJECT the package.
Covers:
- Damages during transit.
- Damages identified at time of delivery.
- Lost during transit.
Does not cover:
- Lost after delivery. Some common examples are "I was not home", "I did not sign for it", "It was left outside", or "It was delivered to the wrong address".
- Damages found after items have been "delivered". Coverage will be declined if damage is found after carrier already delivers the item.
- Customer failed to inspect at time of delivery. Some common examples are "I was not home", or "driver was in a big rush", or "driver did not let me inspect", or "somebody else received it".
- 3rd party receiver failed to inspect at time of delivery. Some common examples are "somebody at the bodyshop received it", or "It was left at the front desk".
* Customers are responsible for their package once an item has been delivered. Please ensure that the package is in a secure environment upon delivery.
** Bodyshops are known to break items during installation. If damage is not identified AT TIME OF DELIVERY, please TAKE YOUR COMPLAINT TO THE BODYSHOP.
*** Bodyshops are known to lose items while items are "just sitting there", or "never touched them". If missing items are not identified AT TIME OF DELIVERY, please TAKE YOUR COMPLAINT TO THE BODYSHOP.
CANCELLATION POLICY
IN STOCK ITEMS - 20% restocking fees apply. 5.2% transaction fees cannot be refunded.
MADE TO ORDER ITEMS (Manufacturing started) - 30% restocking fees apply. 5.2% transaction fees cannot be refunded.
MADE TO ORDER ITEMS (Manufacturing not yet started) - 5.2% transaction fees cannot be refunded.
SPEICAL ORDER/CUSTOM MADE ITEMS - not cancellable
*Shipping cost will be refunded less 5.2% transaction fees.
Reviews ( 0 )
FAQ
FREQUENTLY ASKED QUESTIONS
Does this item fit my vehicle?
Please specify the year of your vehicle and any sub-trim models your vehicle may have and pay close attention to detail in product photos. Item listings will have in the description the models the item will be compatible with. If you are still unsure, please contact one of our sales representatives.
How long does it take to receive my item if shown in stock? And what is the lead time on backorder / pre-order items?
Our lead times for all parts range between 1 to 3 months! We may already have your item incoming! To check, please call one our sales representatives! In stock items ship out between 1-4 business days after purchase (US and Canada). For international orders, please contact one of our sales representatives (stocking is different for international orders).
What is the difference between FRP and Carbon Fiber?
FRP is NOT Carbon Fiber and is a composite material of carbon polymers and fiberglass. Coming in a fresh sanded and primed finish, FRP is ready for paint or wrap! Carbon Fiber, depending on the brand and part, can be offered in Pre-Preg or Vacuum Carbon. Carbon Fiber is a woven pattern of carbon fibers, standard in a 3k weave.
What is "Pre-Preg" and "Vacuum" Carbon Fiber?
-Pre-Preg, also known as Dry Carbon, is a much more durable and lighter form of Carbon Fiber. Baked into its mold, Pre-Preg Carbon has the mold resin pre integrated into the piece.
-Vacuum Carbon Fiber, also known as Wet Carbon, is placed into its mold with resin and vacuum sealed into its form. Both have the same finish but have different structural formulas.
Do you finance?
Yes we do! We offer Affirm and Shop Pay installments! Please view these payment options at checkout, and yes, you do need to be approved to finance!
Do you take custom orders?
We sure do! Please contact us and speak with one of our sales representatives for your custom order inquiry!
Do I need to sign for my package upon delivery?
Yes! All deliveries are signature required and we do ask to inspect package and item before signature to assure item is not damaged. If item is damaged DO NOT sign or accept the package and contact us!
What is the difference between Commercial and Residential shipping address?
Commercial is only needed for freight deliveries. A commercial address can be any place of business on commercial property such as an auto shop, dealership, store, bank, etc. Residential address is and place of residence such as your home, apartment, town home, etc.
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