2000-4030 4.3 Chevy V6 FX Series -5cc Flat Top V6 23 Degree Forged Piston Set 4.030 inch bore Pin Dia.: 0.927" Comp Height: 1.56" Bore Size 4000 in 101520 mm If your full floating

If your full floating

Put the full part # of the single piston you require in the note section of the check out page

best engine building practices dictate that pistons should be replaced in matched sets

One or two replacements might make sense

2000-4030 4.3 Chevy V6 FX Series -5cc Flat Top V6 23 Degree Forged Piston Set 4.030 inch bore Pin Dia.: 0.927" Comp Height: 1.56" Bore Size 4000 in 101520 mm If your full floating266 Chevy V6, FX, Comp Height: 1. 56, 5cc Flat Top , PIN: . 927", Full Floating or Press Fit, Ring Groove: 1. 2 1. 2 3MM, Stroke: 3. 480", ROD: 5. 7, Approx Comp Ratio: 58cc 11. 19, 64cc 10. 39, 70cc 9. 71 *