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Manley Performance Manley Chevy LS-7 Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)
Manley Performance Manley Chevy LS-7 Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)
Manley Performance Manley Chevy LS-7 Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)
Manley Performance Manley Chevy LS-7 Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)
Manley Performance Manley Chevy LS-7 Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)
Manley Performance Manley Chevy LS-7 Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)
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Manley Chevy LS-7 Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)

MAN11679-8
807298062808
Valves
Out of stock
$ 401.42 $ 301.07

SKU: 11679-8 | UPC: 807298062808

Manley Chevy LS1 LS2 LS6 LS7 Small Block Severe Duty Exhaust Valves (Set of 8)

Manley Severe Duty exhaust valves deliver racing-level performance for Chevrolet Small Block LS engines in models like Corvette Camaro and GTO from 1997 to 2013. This set of 8 valves sized 1.600 inch diameter by 5.000 inch length fits LS1 LS2 LS6 and LS7 cylinder heads directly. Built from XH-428 stainless steel they handle extreme heat and RPM in competition builds.

Key Features

  • XH-428 Material: High-nickel stainless steel formulation resists exhaust gas corrosion and maintains strength at high temperatures
  • Valve Dimensions: 1.600 inch head diameter 5.000 inch length .341 inch stem 11/32 inch tip for precise LS head fitment
  • Pro Flo Design: +30 degree Supertech seat face swirl polished back-cut and knife edge promote high-flow exhaust scavenging
  • Undercut Keepers: Reduced keeper groove weight lowers valve train inertia for higher rev limits
  • One-Piece Forged: Fully machined construction ensures straightness and durability under severe duty conditions

Product Notes

  • Set contains exactly 8 exhaust valves for complete V8 replacement
  • Pair with Manley NK-844 intake valves for matched valvetrain setup
  • Inspect cylinder head seats prior to installation for optimal sealing

Installation Notes

  • Professional installation recommended.
  • Check valve spring pressures and retainer compatibility before assembly
  • Compatible with stock or aftermarket LS heads no special hardware needed

This Part Fits

Year Make Model Submodel
1998-2002 Chevrolet Camaro Base LS1 V8-5.7L
1998-2002 Pontiac Firebird Base LS1 V8-5.7L
1997-2004 Chevrolet Corvette Base Z06 LS1 LS6 V8-5.7L
2005-2007 Chevrolet Corvette Base LS2 V8-6.0L
2006-2013 Chevrolet Corvette Z06 LS7 V8-7.0L
2004-2006 Pontiac GTO Base LS1 LS2 V8-5.7L 6.0L
2004-2007 Cadillac CTS V LS6 LS2 V8-5.7L 6.0L
2006-2009 Chevrolet Trailblazer SS LS2 V8-6.0L

Why Choose Manley?

  • Proven in NHRA IHRA and drag racing valvetrain applications
  • Manufactured with tight tolerances for reliable high-RPM operation
  • Engineered and forged in the USA for consistent quality

Frequently Asked Questions

  • Q: Which Chevy LS engines do these valves fit?
    A: Direct fit for Gen III and Gen IV Small Block LS1 LS2 LS6 LS7 cylinder heads in Corvette Camaro GTO and similar models 1997-2013
  • Q: What makes XH-428 material suitable for exhaust valves?
    A: Proprietary stainless with elevated nickel and chromium content provides heat resistance up to 1600 degrees F and fatigue strength for endurance racing
  • Q: What warranty coverage applies?
    A: Manley provides a limited one-year warranty against manufacturing defects when installed by certified professionals

Shipping & Handling

  • Method: UPS Ground or FedEx
  • Availability: In stock - ships same or next business day
  • Packaging: Secure foam-lined box protects valves during transit
  • Weight: 1.65 lbs

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