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GPI – Piston Flycut Tool
$195.50 $136.85
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Multiple size tools available for various valve sizes!
Product Documents
Flycutting Guide
Description
Flycutting tools available for LS3, Gen V LT1, and LS7 intake valve sizes, as well as LS3 exhaust valve size! Easy to use tool to create adequate size valve reliefs without the need for pulling the pistons from the block!
Quick How To Video:
Questions & Answers (34)
Customer questions & answers
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Are you no longer offering this tool for 2.126" Intake valves?
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Q Are you no longer offering this tool for 2.126" Intake valves? answer nowAsked by on June 4, 2026 9:01 amA No you'll have to order direct from the manufacturer lindy tool
CN you use this tool on both intake and exhaust on a l76
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Q CN you use this tool on both intake and exhaust on a l76 answer nowAsked by on February 27, 2026 9:44 pmA They're separate tools but yes
When are you going to have the ls3 intake valve cutter back in stock?
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Q When are you going to have the ls3 intake valve cutter back in stock? answer nowAsked by on October 1, 2025 6:35 pmA Lead times vary best to contact our parts/shipping dept 501-985-4947 ext 5001
I would like some pricing and if they are available for Big Block Chevy (11/32 shaft and 2.30 Valve) in kits for different sizes or individual sizes available.
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Q I would like some pricing and if they are available for Big Block Chevy (11/32 shaft and 2.30 Val...... Read more answer nowAsked by on July 30, 2025 11:10 amA You would need to contact the manufacturer of these Lindy Tool for those
Is there a tool that will work for ford windsor 11/32 valve stem Dia from this vendor?
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Q Is there a tool that will work for ford windsor 11/32 valve stem Dia from this vendor? answer nowAsked by on July 14, 2025 9:09 amA You may want to call Lindy Tools.
A couple while back i bought a piston flycut tool with you guys. I need a lock that has a screw becuse every time i use it the lock is moving from the cutter and the calibration moves. Its a size 5/16
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Q A couple while back i bought a piston flycut tool with you guys. I need a lock that has a screw b...... Read more answer nowAsked by on March 25, 2025 12:06 amA You'll need to reach out to lindy tool and see if thats something they sell, that's who we order those tools from but we don't sell service parts for them
Will this tool work on 799 heads with stock valves and stock hypereutectic pistons? Do you need 2 different tools for intake and exaust?
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Q Will this tool work on 799 heads with stock valves and stock hypereutectic pistons? Do you need 2...... Read more answer nowAsked by on January 27, 2025 4:31 pmA Yes you'll need a tool for both intake and exhaust they're different diameters
Do you have in stock? How long does it take to send it? I would like to know exactly when I would arrive in Dallas, Texas?
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Q Do you have in stock? How long does it take to send it? I would like to know exactly when I would...... Read moreAsked by on January 21, 2025 1:45 pmThere are no answers for this question yet. Answer now
Which one would I use on a older Chevy block with after market heads.i am running 2.08 intake and 1.60 exhaust
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Q Which one would I use on a older Chevy block with after market heads.i am running 2.08 intake and...... Read more answer nowAsked by on January 15, 2025 11:38 pmA I would contact lindy tool who manufacturers these for us to ensure you're getting the right cutter
Will this work on PRC 260 ls3 heads?
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A Not familiar with prc heads but if the intake valve is the same size as stock and stem is same diameter it shouldA Head valves specs are . Stainless Steel Hollow Stem 2.185" Intake Valves & Stainless Steel 1.60" Exhaust Valves
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This tool is amazing for running bigger cams in a motor you’re not fully tearing down. Take your time and the process is pretty simple.
excellent
Tool works great
Bad to the bone
Awesome product!