Katech LT1/L83 OEM Guide Valve Spring Replacement Seat

Katech LT1/L83 OEM Guide Valve Spring Replacement Seat

Spring Seat for Compatible LS and LT1/L83 Heads with PSI-LS1511 Valve Springs.

The Katech LT1/L83 OEM Guide Valve Spring Replacement Seat is designed for compatible LS, LT1, and L83 cylinder heads using PSI-LS1511 valve springs and OEM valve guides. It also works with the new-design Katech LS7/LT1 Bronze Valve Guides.

Its .068-inch thickness must be accounted for when establishing spring installed height.

Features & Benefits

• Designed for Compatible LS, LT1, and L83 Cylinder Heads
• Suitable for OEM Valve Guides and New-Design Katech LS7/LT1 Bronze Valve Guides
• Individual Replacement Component for Valvetrain Service
• Proudly Engineered and Manufactured by Katech Engineering in Clinton Township, Michigan, USA

Technical Specifications

• Product Type: Replacement Valve Spring Seat
• Engine Applications: Compatible LS, LT1, and L83 Cylinder Heads
• Spring Compatibility: PSI-LS1511 Valve Springs
• Valve Guide Compatibility: OEM Guides and Katech LS7/LT1 Bronze Valve Guides
• Thickness: .068 Inch

What's Included

• One Replacement Valve Spring Seat — Sold Individually

Valve springs, valve guides, valve seals, retainers, and valve locks are not included.

Installation Quantity: Sixteen seats are required for a complete compatible sixteen-valve installation.

Compatible Retainers & Valve Seals

Retainer Options:

• Katech LS/LT1/L83/LT4 Titanium Valve Spring Replacement Retainer
• Katech Extreme Duty H13 Tool Steel Valve Spring Replacement Retainer

Valve Seal Options:

• GM Intake Valve Seal and GM Exhaust Valve Seal
• Katech Valve Seals for Both Intake and Exhaust Applications

Select the appropriate seals for the valve guide configuration. Katech recommends the compatible tool steel retainer for street, road racing, and endurance applications; titanium remains recommended for drag racing.

Fitment & Installation Notes

Confirm that the seat, guide, spring, retainer, and valve seal match the intended cylinder head assembly before installation. Bronze guide compatibility applies to the specified new-design Katech guides.

• Verify Valve Guide Boss and Spring Seat Dimensions
• Account for Seat Thickness When Measuring Spring Installed Height
• Check Spring Pressures at the Measured Installed Height
• Confirm Valve Seal Fit and Clearance
• Verify Valve Stem and Valve Lock Compatibility
• Verify Coil Bind Clearance at Maximum Valve Lift
• Check Retainer-to-Seal and Retainer-to-Guide Clearance

Why Choose Katech

The Katech LT1/L83 OEM Guide Valve Spring Replacement Seat supports component selection across compatible factory-guide and updated Katech bronze-guide assemblies. Katech Technical Sales can help match the supporting parts to your cylinder head configuration.

For spring seat, guide, retainer, and seal compatibility questions, contact .