High compression. 883-1200 conversion piston set. Compatible with stock unmodified cylinder heads. 10:1 Compression ratio. Piston weight 335gr. Piston pin diameter .792" and weight 97gr. Head type: Dish. Dome +10cc. Compression height 1.210". Bore 3.498". Stroke 3.812". Rod length 6.926". Cyl. length 4.650". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions. Note: 1200cc cylinders must be purchased for 04-up 883 XL models. Stock cylinders liners of 04-up XL models are too thin to bore to 1200 size.

Standard replacement piston set; for stock or high lift camshafts. With a lowered top ring and deeper valve pockets to accomodate the higher lift cams. Stock 9.0:1 compression ratio. Piston weight 341gr. Piston pin weight 97gr. Head type: Flat top / Dome +1.5cc. Compression height 1.210". Bore 3.498" / Stroke 3.812". Rod length 6.938" / Cyl. length 4.650". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.

Compatible with stock cylinders and heads; gives stock compression ratio. 8.5:1 CR. Piston weight 370gr. Piston pin weight 97gr. Head type: Dome 0.656" / Dome -57cc. Compression height 1.450". Bore 3.4375" / Stroke 3.969" (3-31/32"). Rod length 7.440" / Cyl. length 5.330". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.

8.0:1 CR. Piston weight 357gr. Piston pin weight 97gr. Head type: Dome 0.426" / Dome -30cc. Compression height 1.285". / Bore 3.4980". Stroke 4.250" (4-1/4"). Rod length 7.440" / Cyl. length 5.330". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions. Note: Around 30% of stock 1340cc Shovel cylinders may present a problem in combination with the location of some of the oil return holes since KB pistons have a wider piston ring pack for better piston stability in the cylinder. In these cases the oil return hole must be re-located (lowered) to avoid excessive oil consumption.

High compression pop-up piston set. 9.5:1 CR. Piston weight 388gr. Piston pin weight 97gr. Head type: Dome / Dome -47cc. Compression height 1.285" / Bore 3.4980". Stroke 4.250". Rod length 7.440" / Cyl. length 5.330". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions. Note: Around 30% of stock 1340cc Shovel cylinders may present a problem in combination with the location of some of the oil return holes since KB pistons have a wider piston ring pack for better piston stability in the cylinder. In these cases the oil return hole must be re-located (lowered) to avoid excessive oil consumption.

Pop-up high compression. 10.5:1 CR. Piston weight 360gr. Piston pin weight 97gr. Head type: Dome 0.200". Dome -18cc. Compression height 1.375". Bore 3.4980". Stroke 4.250" (4-1/4"). Rod length 7.440". Cyl. length 5.550". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.

3-5/8" big bore piston set. Used with 3 5/8" big bore cylinders with 5.330" (stock) to 5.530" (+.200") length. Use with 4-1/4" stock stroke (88"); 4-1/2" (93"); 4-5/8" (96") to 4-3/4" (98") stroker flywheels. 10.0:1 CR. Piston weight 385gr. Piston pin weight 97gr. Head type: Dome / Dome -57cc. Compression height 1.285" / Bore 3.625" (3 5/8"). Stroke 4.250" to 4.750" (4-1/4" to 4-3/4"). Rod length 7.440" / Cyl. length 5.330" (Std) to 5.530" (+.200"). Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions. Note: 5.330" cylinders can be used with stock 4-1/4" stroke. Longer strokes require correct length longer cylinders or stroker plates to achieve the desired compression ratio. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation.

88" to 95" big bore conversion kit. Used with stock heads and cylinders; 3-3/4" bore and 4.938" long cylinders. By boring the stock cylinders to the 3-7/8" big bore size you will increase engine capacity from 88" (1448cc) to 95" (1546cc). 9.25:1 CR. Piston weight 400gr. Piston pin weight 97gr. / Head type: Flat top. Dome +16.7cc / Compression height 1.270". Bore 3.875" (3-7/8") / Stroke 4.000". Rod length 7.667" / Cyl. length 4.938". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.

Standard replacement piston set. Stock 9.0:1 compression ratio. Piston weight 253gr. Piston pin weight 77gr. Head type: Flat top / Dome +1.2cc. Compression height 1.210". Bore 3.00" / Stroke 3.812". Rod length 6.926" / Cyl. length 4.650". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.