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SKU: 218133BK
Kooks 3-Inch Stainless Steel 5-Inch Bodied Ultra-GREEN Connection Pipes with Blankets for 2023+ Chevrolet Corvette C8 Z06 LT6 5.5L
The Kooks 218133BK Ultra-GREEN Connection Pipes with Blankets deliver a precise emissions-compliant link between aftermarket headers and OEM exhaust on 2023+ Chevrolet Corvette C8 Z06 models, tackling the challenge of maintaining high-flow while meeting federal standards under the LT6's 670-horsepower flat-plane crank demands.
These 3-inch diameter pipes feature a compact 5-inch metallic substrate body for rapid catalyst activation and sustained efficiency, wrapped in heat-dissipating blankets to reduce underbody temperatures by up to 50% and shield sensitive components. Mandrel-bent from 304 stainless steel, they bolt directly to Kooks Tri-Y headers and factory mid-pipes without adapters, enabling seamless integration that preserves torque curves from 3,000-8,600 RPM.
Dyno-proven to support the full engine output without backpressure, this kit stands as the emissions-legal path for Z06 owners pursuing header upgrades, ensuring track-ready response and street-legal operation in non-CARB states.
Key Features
- 3-Inch Mandrel-Bent Tubing: Full 3-inch diameter for unrestricted exhaust flow matching LT6 powerband.
- 5-Inch Metallic Substrate Body: High-efficiency catalyst core with quick light-off for low-emission startup.
- Heat Blanket Wrapping: Fiberglass-insulated covers on both pipes to minimize radiant heat and protect wiring/fuel lines.
- 304 Stainless Steel Construction: Fully welded for corrosion resistance and longevity under high EGTs.
- Direct Bolt-On Design: Flanged connections to Kooks headers and OEM exhaust; no welding or modifications needed.
- EPA-Compliant: 49-state legal high-flow cats tested for durability and performance.
Product Notes
- 49-state legal (EPA compliant) not for use in California or CARB-adopting states without exemption.
- Requires O2 sensor extensions if not included with headers verify ECU adaptation post-install.
- Heat blankets are removable for inspection but recommended for daily driving to control temperatures.
- Not compatible with stock manifolds designed for Kooks 1-7/8" x 2" Tri-Y headers (part #2181Y500).
- California Proposition 65: May contain chemicals known to cause cancer or reproductive harm.
Warranty: Limited lifetime on construction 25,000 miles on catalyst effectiveness.
Installation Notes
- Professional installation recommended lift vehicle and support exhaust for alignment.
- Bolt pipes to header collectors using provided gaskets and hardware torque to 25-30 ft-lbs.
- Route O2 sensors through blanket slits secure blankets with included clamps.
- Perform drive cycle to allow ECU relearn check for leaks after first heat-up.
This Part Fits
| Year | Make | Model | Submodel/Engine |
|---|---|---|---|
| 2023–2025 | Chevrolet | Corvette | C8 Z06 (LT6 5.5L V8) |
| 2024–2025 | Chevrolet | Corvette | E-Ray Z06 (LT6 5.5L V8 Hybrid) |
Note: Fits mid-engine layout with 3-inch OEM exhaust connections. Confirm header compatibility for full system.
What's Included in the Purchase
- (2) 3-Inch Ultra-GREEN Catted Connection Pipes (5-inch body length, stainless steel)
- (2) Heat Dissipation Blanket Wraps with Clamps and Hardware
- Gaskets and Flange Bolts for Header and OEM Connections
- O2 Sensor Extensions and Mounting Clips
- Detailed Installation Instructions
- Part Numbers: Connection Pipes (218133), Blankets (218133B2)
Total Package Weight: 18 lbs | Shipping Dimensions: 24" L x 12" W x 8" H (boxed for ground freight)
Why Choose Kooks?
- Over 60 years of exhaust engineering, powering NHRA, NASCAR, and SCCA champions.
- Handcrafted in the USA from T304 aircraft-quality stainless steel for precision fit.
- Limited lifetime warranty and dyno-validated for real-world gains.
Frequently Asked Questions
-
Q: Are these pipes legal in California?
A: No, 49-state EPA compliant only, CARB requires EO-numbered alternatives. -
Q: Do the blankets affect sound or flow?
A: No impact on performance, they focus on heat management without restricting exhaust. -
Q: What headers pair with this kit?
A: Kooks 1-7/8" x 2" Stepped Tri-Y Headers (2181Y500) for direct bolt-on.
Shipping & Handling
- Method: Ground freight UPS/FedEx.
- Availability: Ships within 1-2 business days.
- Packaging: Foam-padded box with protective sleeves for pipes and blankets.
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