ACS Composite rear window spoiler on white, angled view showing the moulded curve that follows the top edge of the rear glass
ACS Composite rear window spoiler fitted to an orange narrow-body C8 Corvette, rear three quarter view above the engine glass
ACS Composite rear window spoiler on an orange narrow-body C8 Corvette, straight down on the rear glass and the window bezels
ACS Composite rear window spoiler on white, seen head on, showing the full width of the moulded lip
ACS Composite rear window spoiler fitted to an orange narrow-body C8 Corvette, looking down the rear deck at the glass edge
ACS Composite rear window spoiler on an orange narrow-body C8 Corvette photographed outdoors, showing the finished edge along the glass
ACS Composite rear window spoiler on white, angled view showing the moulded curve that follows the top edge of the rear glass
ACS Composite rear window spoiler fitted to an orange narrow-body C8 Corvette, rear three quarter view above the engine glass
ACS Composite rear window spoiler on an orange narrow-body C8 Corvette, straight down on the rear glass and the window bezels
ACS Composite rear window spoiler on white, seen head on, showing the full width of the moulded lip
ACS Composite rear window spoiler fitted to an orange narrow-body C8 Corvette, looking down the rear deck at the glass edge
ACS Composite rear window spoiler on an orange narrow-body C8 Corvette photographed outdoors, showing the finished edge along the glass
ACS Composite

C8 Corvette Grand Sport and Grand Sport X ACS Composite Rear Window Spoiler

[50-4-151]CFZ

$299.00 $239.00 Save $60.00
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ACS Composite Rear Window Spoiler - C8 Corvette Grand Sport and Grand Sport X

Both 2027 cars sit on the same rear glass, so there is one part to order and no version to get wrong: 50-4-151. The ACS Composite Rear Window Spoiler is a molded PC composite lip that finishes the upper edge of the hatch glass on a 2027 C8 Corvette Grand Sport or Grand Sport X coupe, in Carbon Flash Metallic Black.

A new car arrives with a short list of things the factory left plain, and the top edge of the rear glass is one of them. It is a cut line, and it sits directly above the engine you paid for. Owners who tint the hatch find the same thing from the other direction: the trimmed edge of the film never quite disappears. The spoiler closes both problems with a single molded lip in Carbon Flash Metallic Black, meeting the factory window bezels either side. Search a corvette c8 spoiler and you get wings; this is the other kind, the c8 rear window spoiler that changes a line rather than the airflow.

Product Details

  • Part number: [50-4-151]CFZ
  • Part: 50-4-151, the revised version for the 2025 to 2027 rear glass
  • Fits: 2027 Grand Sport and 2027 Grand Sport X coupe
  • Material: PC composite, molded by resin transfer molding
  • Finish: Carbon Flash Metallic Black, the only finish we carry
  • Fixing: High strength 3M tape, applied to the glass edge
  • Drilling: None
  • Install time: Around thirty minutes
  • Body style: Coupe
  • Built: North America

Benefits

  • One part number for both 2027 cars, so there is nothing to work out before ordering
  • Turns the bare upper edge of the rear glass into a finished line
  • Covers a tint edge, which is the reason most owners come looking for it
  • Carbon Flash Metallic Black is the same family as the factory bezels beside it, so it does not announce itself
  • A c8 corvette rear spoiler that leaves the aero exactly as delivered

What to Expect

  • Clean the glass edge, dry fit the piece, then peel and set it. Nothing is drilled and nothing is removed
  • Work above sixty degrees and out of direct sun so the tape bonds properly
  • If the hatch is going to be tinted, tint it first and let the shop trim to the spoiler

CORVETTE COMPATIBILITY

  • Generation: C8 Corvette
  • Models: Grand Sport and Grand Sport X
  • Model Years: 2027
  • Engine: 6.7L LS6 V8, and on the Grand Sport X the LS6 with the front electric motor
  • Front electric drive: Grand Sport X only. GM's Electric Drive Unit on the front axle, 186 hp and 145 lb-ft to the front wheels, 721 hp combined and all-wheel drive. The Grand Sport is rear-wheel drive
  • Body: Coupe
  • Part: 50-4-151 only

Why Buy from Custom Corvette Accessories?

Custom Corvette Accessories is enthusiast-run and Corvette-focused. The ACS Composite Rear Window Spoiler is a direct upgrade for 2027 C8 Corvette Grand Sport and Grand Sport X owners who want the bare upper edge of the rear glass finished on a new car.

The [50-4-151]CFZ is engineered for the revised rear glass carried by every 2027 Grand Sport and Grand Sport X coupe, and the ACS Composite Rear Window Spoiler delivers molded PC composite construction, a Carbon Flash Metallic Black finish matched to the factory window bezels, and a tape-mounted direct fit without compromising the aero as delivered.

✅ In-stock items ship in 1–2 business days via Standard Ground.

✅ Free shipping items are available in the Continental US only.

✅ Custom quotes available for 2-Day, Next Day, or Saturday delivery.

✅ Custom or backordered items ship as soon as available.

View our full shipping policy →

Vehicle Fitment & Specifications

Generation: C8
Trim Level: Grand Sport, Grand Sport X
Engine Code: LS6
Transmission Type: Dual-Clutch
Intended Use: Street, Track

Frequently Asked Questions

Yes, and it fits the Grand Sport X as well. Both are 2027 coupes and both take part 50-4-151.
Only one. GM revised the rear glass for the 2025 model year, so every 2027 car is on the revised glass and takes 50-4-151. There is no earlier version to choose between.
No. This is a coupe part. It runs along the top edge of the rear glass hatch, which the convertible does not have in the same form.
It tapes on. Clean the glass edge, dry fit the piece, then peel and set it. No drilling, no fasteners, about thirty minutes.
Carbon Flash Metallic Black. It is the only finish we carry, and it is the one that matches the factory window bezels either side of the glass.

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