Put the full part # of the single piston you require in the note section of the check-out page
Because the singles you are purchasing were not made at the same time your original pistons were made there will be variations that could effect their weight
Custom Bore Size Option: This Option is perfect for Engine builders who do not want to unnecessarily oversize the cylinder bores on a block
It can be done after the fact but pin fitting the pistons twice adds on quite a bit more labor
413 Small Block Chevy
2105-4040 350 Small Block Chevy FX Series -21cc Dish Top SBC 23 Degree Forged Piston Set 4.040 inch bore Pin Dia.: 0.927" Comp Height: 1.26" Engine Size 4.3 Put the full part #357 Small Block Chevy, FX, Comp Height: 1. 26, 21cc Dish Top, PIN: . 927", Full Floating or Press Fit, Ring Groove: 1. 2 1. 2 3MM, Stroke: 3. 480", ROD: 6, Approx Comp Ratio: 58cc 9. 37, 64cc 8. 83, 70cc 8. 35 *