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USA Hand Built Performance Headers Proven on the Dyno and the Strip
The Kooks 2181Y500 1-7/8-inch to 2-inch stepped Tri-Y headers are the ultimate naturally aspirated exhaust upgrade for the 2023 and 2025 Corvette Z06 with the flat-plane crank LT6 5.5L V8, replacing factory manifolds to deliver dyno-proven gains of 55 and 75 rear-wheel horsepower and 50 and 70 lb-ft of torque through equal-length Tri-Y primaries that optimize exhaust scavenging across the entire 8,600 RPM redline for explosive mid-range punch and top-end rush.
Handcrafted from T304 aircraft-quality stainless steel with 3/8-inch laser-cut oval-port flanges, merged collectors, and a flanged outlet designed to mate directly to Kooks Ultra GREEN catted connection pipes, this header set supports over 1,000 HP while preserving factory ground clearance and heat shielding. The stepped Tri-Y design is the proven choice for maximizing the LT6’s exotic high-revving character without sacrificing street drivability or emissions readiness.
For C8 Z06 owners who demand championship-level performance from the world’s most powerful naturally aspirated V8, the 2181Y500 Tri-Y headers are the race-winning, complete bolt-on solution trusted by the fastest Corvettes on road and track.
Key Features
- 1-7/8" to 2" stepped Tri-Y primaries for peak LT6 power
- Equal-length design with merged collectors
- Full T304 stainless steel with TIG welds and 3/8-inch oval-port flanges
- Flanged outlet for direct connection to Kooks catted pipes
- Direct bolt-on with factory-style mounting
- Dyno gains of 55 and 75 RWHP and 50 and 70 RWTQ
Product Notes
- Headers only requires Kooks Ultra GREEN catted connection pipes (218133BK) for full system
- 49-state legal when paired with Kooks GREEN cats
- Fits all 2023 and 2025 Z06 coupe and convertible
California Proposition 65: Contains chemicals known to the State of California to cause cancer or reproductive harm.
Warranty: Limited lifetime on stainless construction to original purchaser.
Installation Notes
- Professional installation required lift and mid-engine experience needed
- Remove factory manifolds and bolt headers to cylinder heads
- Connect to Kooks catted pipes or aftermarket mid-pipe
- Torque flanges to 25-30 ft-lbs and run drive cycle for ECU
This Part Fits
| Year | Make | Model | Submodel/Engine |
|---|---|---|---|
| 2023 and 2025 | Chevrolet | Corvette | Z06. LT6 5.5L V8 |
Note: Fits all 2023 and 2025 C8 Z06 coupe and convertible. Headers only.
What's Included in the Purchase
- (2) 1-7/8" x 2" Stepped Tri-Y T304 Stainless Headers with Merged Collectors
- Gaskets, Stage 8 Locking Header Bolts, and Hardware Kit
- Detailed Installation Instructions
- Part Number: Kooks 2181Y500
Why Choose Kooks?
- Over 60 years of championship-winning exhaust engineering
- Handcrafted in the USA from T304 aircraft-quality stainless steel
- Limited lifetime warranty and dyno-proven performance
Frequently Asked Questions
-
Q: Does this include cats?
A: No, headers only and pair with Kooks 218133BK Ultra GREEN catted pipes -
Q: Will it fit the 2025 Z06?
A: Yes, direct bolt-on for every 2023 and 2025 C8 Z06 -
Q: How does it sound?
A: Pure flat-plane crank scream above 6,000 RPM with deep V8 rumble below -
Do Kooks headers require a tune after installation?
Yes. A professional tune is strongly recommended after installing long tube headers. The significant improvement in exhaust flow changes air fuel ratios and requires ECM recalibration to achieve optimal power output and safe operation. -
Will these headers void my factory powertrain warranty?
Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty simply because you installed an aftermarket part unless they prove the component directly caused the failure. Consult your dealer for specifics on your situation. -
Q: Do these Kooks headers require a tune after installation?
A: Yes. A professional tune is strongly recommended after installing long tube headers. The significant improvement in exhaust flow changes air fuel ratios and requires ECM recalibration to achieve optimal power output and safe operation. -
Q: Will Kooks headers void my factory powertrain warranty?
A: Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty simply because you installed an aftermarket part unless they prove the component directly caused the failure in question. Consult your dealer for specifics. -
Q: What warranty does Kooks provide?
A: Kooks products are backed by a limited lifetime warranty to the original purchaser against defects in materials and workmanship. Racing and competition use applications may have specific warranty exclusions. Contact Kooks Performance directly for warranty details.
Shipping & Handling
- Method: UPS or Fed Ex Ground.
- Availability: Typically ships same day or next if in stock.
- Packaging: Heavy-duty box with foam protection.
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