Icon Pistons FHR Forged Flat Top Piston Set - 4.030 in Bore - 1.5 x 1.5 x 3.0 mm Ring Grooves - Minus 3.30 cc - GM LS-Series (Set of 8) 2.5-3.5-100TENDER 6" center to center between

6" center to center between slots

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Icon Pistons FHR Forged Flat Top Piston Set - 4.030 in Bore - 1.5 x 1.5 x 3.0 mm Ring Grooves - Minus 3.30 cc - GM LS-Series (Set of 8) 2.5-3.5-100TENDER 6" center to center betweenProduct Description: Piston FHR Forged Flat Top 4. 030 in Bore 1. 304 in Compression Height 1. 5 x 1. 5 x 3. 0 mm Ring Grooves Minus 3. 30 cc GM LS Series Set of 8 United Engine and Machine Company was started in 1922 in Fresno, California. Then in 1930 the company was moved to San Leandro, California in order to supply OEM manufacturers located on the West Coast. The company relocated to Carson City, Nevada in 1978, where it has continued to grow.