2005-4000 350 Small Block Chevy FX Series -21cc Dish Top SBC 23 Degree Forged Piston Set 4.000 inch bore Pin Dia.: 0.927" Comp Height: 1.56" Stroke 3.480" They are made to order

They are made to order and are NOT RETURNABLE under any circumstances

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

You can increase the service life of a block by only honing what you need to remove taper and make the cylinders round again

The extra $80

2005-4000 350 Small Block Chevy FX Series -21cc Dish Top SBC 23 Degree Forged Piston Set 4.000 inch bore Pin Dia.: 0.927" Comp Height: 1.56" Stroke 3.480" They are made to order350 Small Block Chevy, FX, Comp Height: 1. 56, 21cc Dish 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 9. 22, 64cc 8. 69, 70cc 8. 22 *