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SKU: 12347-8 | UPC: 807298086019
Manley Chevy LT-1 6.2L 1.590in Head Diameter Pro Flo/Severe Duty Exhaust Valves (Set of 8) - Fits 2014-2019 Corvette, 2016-2023 Camaro
Manley Pro Flo Severe Duty Exhaust Valves deliver reliable power for Chevy LT1 6.2L engines in 2014-2019 Corvette Stingray and 2016-2023 Camaro SS models. Crafted from heat-resistant XH-428 Inconel these 1.590 inch head diameter valves handle extreme racing conditions with fatigue resistance. This set of 8 provides direct replacement for stock exhaust valves boosting engine breathing.
Key Features
- XH-428 Inconel Material: Resists high exhaust temperatures and maintains strength under prolonged high-rpm use
- 1.590in Head Diameter: Exact OEM match ensures drop-in fit and maintains stock valve shrouding for optimal combustion
- 11/32in Stem Diameter: Precision ground at 0.343in for tight guide clearance and reduced wear
- 4.875in Overall Length: Matches factory specs for correct valve timing lift and installed height
- Swirl Polished Finish: Enhances exhaust flow reduces valve bounce and supports higher rev limits
Product Notes
- Verify cylinder head valve seats before installation for compatibility
- Pair with upgraded valve springs rated for LT1 performance levels
- Handle valves carefully to avoid nicks on stems or seats
Installation Notes
- Professional installation recommended.
- Requires three-angle valve job for best sealing and flow
- Direct fit no machining needed compatible with stock LT1 heads
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2014-2019 | Chevrolet | Corvette | Stingray |
| 2016-2023 | Chevrolet | Camaro | SS |
Why Choose Manley?
- Decades of experience supplying valves to professional race teams
- Advanced alloys like XH-428 proven in NHRA and drag racing
- CNC machined in USA for exact tolerances and consistent quality
Frequently Asked Questions
-
Q: Will these fit my 2016 Camaro SS LT1?
A: Yes fits all 2016-2023 Chevrolet Camaro SS with 6.2L LT1 V8 engine VIN U. -
Q: What makes the XH-428 material suitable for exhaust valves?
A: XH-428 Inconel alloy offers superior heat corrosion resistance and tensile strength for severe duty exhaust applications. -
Q: What is the Manley warranty on these valves?
A: Lifetime warranty against manufacturing defects when installed by certified engine builder.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Secure Manley box with foam inserts
- Weight: 2 lbs
Manley Performance
Founded in 1966 by Hank Manley, Manley Performance Products has become one of the most respected names in high-performance engine components. Originally launched as Manley Speed Equipment, the company quickly earned a reputation for precision manufacturing, durability, and race-proven performance. From grassroots beginnings in New Jersey to global recognition in professional motorsports, Manley Performance continues to set the standard in high-performance automotive parts. Manley Performance Engine Parts Manley is known for manufacturing premium internal engine components designed for street, strip, and professional racing applications. Their product line includes: Manley stainless steel valves Manley forged pistons Manley connecting rods (H-Beam, I-Beam, Turbo Tuff, Pro Series) Manley camshafts Manley crankshafts Manley valvetrain components Valve springs, retainers, and hardware Every Manley component is engineered with strict quality control and race-driven innov...
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