GPI Piston Flycut Tool - LS1 / LS2 Exhaust Valve - GPI-CATLS1EX
Precision Flycut Tool for LS1 & LS2 Exhaust Valve Reliefs
The GPI Piston Flycut Tool for LS1/LS2 exhaust valves lets engine builders machine accurate piston valve reliefs without removing the pistons from the block. This tool is a must-have when running aggressive camshafts, higher lift profiles, or upgraded cylinder heads that require additional piston-to-valve clearance on LS1 and LS2 engines.
GPI's flycut tool lineup includes versions for LS3 intake, LS3 exhaust, LS7 intake, and Gen V LT1 intake - ensuring precise relief machining for nearly all common LS/LT performance platforms.
Engine-In-Block Machining for Faster, Cleaner Work
This tool eliminates the need for full piston removal and machine shop processing by enabling clean, accurate relief cuts directly in the assembled engine. The cutter is specifically sized for the LS1/LS2 exhaust valve diameter, ensuring perfect fitment and consistent machining depth.
Whether you're upgrading to a bigger cam, adjusting timing events, or building a high-compression LS, this tool provides the clearance necessary to protect your pistons and valves under all operating conditions.
Features
- Creates precise LS1 / LS2 exhaust valve reliefs
- Cuts reliefs with pistons still installed
- Designed for high-lift camshaft and performance valvetrain setups
- Compatible with GPI tools for LS3, LS7, and LT1 valve sizes
- Simple to use on both in-car and engine-stand builds
- Saves time, labor, and eliminates costly machine shop delays
Quick Specs
- Application: LS1 / LS2 exhaust valve diameter
- Function: Cuts piston valve reliefs in-block
- Pistons May Remain Installed: Yes
- Compatible Variants: LS3 Intake, LS3 Exhaust, LS7 Intake, LT1 Intake
- Part Number: GPI-CATLS1EX
FAQs
When should LS1/LS2 pistons be flycut for exhaust clearance?
Flycutting is recommended when running aggressive cams, increased exhaust valve lift, or tighter valve timing that reduces clearance and risks piston-to-valve contact.
Do I need to remove the pistons to use this flycut tool?
No. This tool is designed specifically to cut reliefs with pistons in the block, saving significant teardown and machining time compared to traditional methods.
Why Buy from Beefcake Racing?
Beefcake Racing offers premium LS engine-building tools backed by hands-on performance experience. Whether you're performing a simple cam upgrade or assembling a full engine build, our team ensures you get the correct tools and components for your LS project.
Call 1-855-827-7223 or email sales@beefcakeracing.com.
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