ICON FHR Series Pistons for GM LS

5.0 out of 5 stars 6 Customer Reviews

ICON FHR Series pistons for GM LS offer premium, custom options in an "off the shelf" option for your LS-family engine. FHR (Formed Head Relief) pistons have valve

ICON FHR Series pistons for GM LS offer premium, custom options in an "off the shelf" option for your LS-family engine. FHR (Formed Head Relief) pistons have valve reliefs that are formed in as the piston blank is pressed into the die, creating a stock, but light forging. Many of the domed models are solid which allows tailoring the dome height for a specific compression ratio. They are constructed from high-strength, forged 4032 aluminum alloy for increased durability while maintaining tighter piston-to-wall clearance for increased cylinder sealing, lower cylinder wear, and stock-like noise levels, making them ideal for street and lightly boosted applications.

ICON FHR pistons for GM LS also feature:

* Mini grooves allow an overheated piston that contacts a cylinder wall to transfer heat to the wall. Friction is also reduced over a solid ring land.
* Accumulator grooves provide a reservoir area for gases that pass by the top ring. Pressure is reduced between top and second ring to help stabilize flutter and maximize ring seal.
* 0.030 in. offset wrist pins
* Round wire locks
* M42 skirt coating

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Results 1 - 25 of 45

ICON FHR Series Pistons for GM LS IC9985C.020

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.800 in. Bore, 0.945 in. Wrist Pin, GM, LS, 4.8/5.3L, Set

Part Number: UEM-IC9985C-020

5.0 out of 5 stars ( 1 )

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ICON FHR Series Pistons for GM LS IC9991C.030

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 4.030 in. Bore, 0.927 in. Wrist Pin, GM, LS, 6.0/6.2L, Set

Part Number: UEM-IC9991C-030

5.0 out of 5 stars ( 1 )

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ICON FHR Series Pistons for GM LS IC9992C.030

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 4.030 in. Bore, 0.927 in. Wrist Pin, GM, LS, 6.0/6.2L, Set

Part Number: UEM-IC9992C-030

5.0 out of 5 stars ( 1 )

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ICON FHR Series Pistons for GM LS IC9988C.STD

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.898 in. Bore, 0.945 in. Wrist Pin, GM, LS, 5.7L, Set

Part Number: UEM-IC9988C-STD

Not Yet Reviewed

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ICON FHR Series Pistons for GM LS IC9991C.020

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 4.020 in. Bore, 0.927 in. Wrist Pin, GM, LS, 6.0/6.2L, Set

Part Number: UEM-IC9991C-020

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ICON FHR Series Pistons for GM LS IC9985C.STD

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.780 in. Bore, 0.945 in. Wrist Pin, GM, LS, 4.8/5.3L, Set

Part Number: UEM-IC9985C-STD

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ICON FHR Series Pistons for GM LS IC9992C.065

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 4.065 in. Bore, 0.927 in. Wrist Pin, GM, LS, 6.0/6.2L, Set

Part Number: UEM-IC9992C-065

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ICON FHR Series Pistons for GM LS IC9992C.005

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 4.005 in. Bore, 0.927 in. Wrist Pin, GM, LS, 6.0/6.2L, Set

Part Number: UEM-IC9992C-005

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ICON FHR Series Pistons for GM LS IC9991C.STD

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 4.000 in. Bore, 0.927 in. Wrist Pin, GM, LS, 6.0/6.2L, Set

Part Number: UEM-IC9991C-STD

Not Yet Reviewed

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ICON FHR Series Pistons for GM LS IC9991C.065

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 4.065 in. Bore, 0.927 in. Wrist Pin, GM, LS, 6.0/6.2L, Set

Part Number: UEM-IC9991C-065

Not Yet Reviewed

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ICON FHR Series Pistons for GM LS IC9985C.030

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.810 in. Bore, 0.945 in. Wrist Pin, GM, LS, 4.8/5.3L, Set

Part Number: UEM-IC9985C-030

Not Yet Reviewed

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ICON FHR Series Pistons for GM LS IC9985C.010

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.790 in. Bore, 0.945 in. Wrist Pin, GM, LS, 4.8/5.3L, Set

Part Number: UEM-IC9985C-010

Not Yet Reviewed

Estimated Ship Date: Jan 20, 2026 if ordered today

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Estimated Ship Date: Jan 20, 2026 if ordered today

ICON FHR Series Pistons for GM LS IC9992C.STD

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 4.000 in. Bore, 0.927 in. Wrist Pin, GM, LS, 6.0/6.2L, Set

Part Number: UEM-IC9992C-STD

Not Yet Reviewed

Estimated Ship Date: Today

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ICON FHR Series Pistons for GM LS IC9988C.005

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.903 in. Bore, 0.945 in. Wrist Pin, GM, LS, 5.7L, Set

Part Number: UEM-IC9988C-005

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

ICON FHR Series Pistons for GM LS IC9989C.STD

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.898 in. Bore, 0.927 in. Wrist Pin, GM, LS, 5.7L, Set

Part Number: UEM-IC9989C-STD

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

ICON FHR Series Pistons for GM LS IC9987C.040

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.820 in. Bore, 0.927 in. Wrist Pin, GM, LS, 4.8/5.3L, Set

Part Number: UEM-IC9987C-040

Not Yet Reviewed

Estimated Ship Date: Jan 20, 2026 if ordered today

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Estimated Ship Date: Jan 20, 2026 if ordered today

ICON FHR Series Pistons for GM LS IC9990C.010

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.908 in. Bore, 0.927 in. Wrist Pin, GM, LS, 5.7L, Set

Part Number: UEM-IC9990C-010

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

ICON FHR Series Pistons for GM LS IC9988C.010

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.908 in. Bore, 0.945 in. Wrist Pin, GM, LS, 5.7L, Set

Part Number: UEM-IC9988C-010

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

ICON FHR Series Pistons for GM LS IC9992C.010

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 4.010 in. Bore, 0.927 in. Wrist Pin, GM, LS, 6.0/6.2L, Set

Part Number: UEM-IC9992C-010

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

ICON FHR Series Pistons for GM LS IC9990C.STD

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.898 in. Bore, 0.927 in. Wrist Pin, GM, LS, 5.7L, Set

Part Number: UEM-IC9990C-STD

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

ICON FHR Series Pistons for GM LS IC9987C.030

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.810 in. Bore, 0.927 in. Wrist Pin, GM, LS, 4.8/5.3L, Set

Part Number: UEM-IC9987C-030

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

ICON FHR Series Pistons for GM LS IC9989C.005

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.903 in. Bore, 0.927 in. Wrist Pin, GM, LS, 5.7L, Set

Part Number: UEM-IC9989C-005

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

ICON FHR Series Pistons for GM LS IC9991C.005

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 4.005 in. Bore, 0.927 in. Wrist Pin, GM, LS, 6.0/6.2L, Set

Part Number: UEM-IC9991C-005

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

ICON FHR Series Pistons for GM LS IC9991C.010

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 4.010 in. Bore, 0.927 in. Wrist Pin, GM, LS, 6.0/6.2L, Set

Part Number: UEM-IC9991C-010

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

ICON FHR Series Pistons for GM LS IC9985C.040

Pistons, FHR Coated, Forged 4032 Aluminum, Flat Top with Two Reliefs, 3.820 in. Bore, 0.945 in. Wrist Pin, GM, LS, 4.8/5.3L, Set

Part Number: UEM-IC9985C-040

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

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