Big Bore Kits

Showing 1–48 of 58 Screamin' Eagle Performance

Screamin' Eagle Piston Kit, 4.310" bore, 4.500" stroke.

Harley-Davidson Accessories

#21900099

£423.43£381.09

Member£359.92-15%

3-7/8" Standard Bore. When combined with stock cylinder heads, these forged 3-7/8" pistons boost the compression ratio of your 3-7/8" big bore cylinder set-up. The combination results in a compression ratio of 10.5:1. Piston skirts feature a unique black coating for improved wear-resistance, better fit and reduced noise. These pistons include Titanium SST rings to withstand the stresses seen in racing. Complete kit includes pistons, rings, wrist pins and clips.

Harley-Davidson Accessories

#22144-08B

£381.08£342.97

Member£323.92-15%

Convert your XL883 to a full 1200cc with this Piston Kit. These forged pistons have a redesigned "dished" top that has been optimized for use with stock 883 heads. Compression ratio is increased to 10:1, and works great with Screamin' Eagle cams. Kit includes pistons, rings, pins and circlips.

Harley-Davidson Accessories

#22698-01A

£340.80£306.72

Member£289.68-15%

Convert your XL883 to a full 1200cc with this Piston Kit. These forged pistons have a redesigned "dished" top that has been optimized for use with stock 883 heads. Compression ratio is increased to 10:1, and works great with Screamin' Eagle cams. Kit includes pistons, rings, pins and circlips.

Harley-Davidson Accessories

#22700-01A

£340.80£306.72

Member£289.68-15%

Designed to develop a 10.5:1 compression ratio when combined with stock heads, or 11.3:1 ratio when combined with Screamin' Eagle Performance Heads P/N 16677-07 or 16677-05. These forged pistons have been plated with electroless-nickel for maximum durability in high-performance applications. Kit includes a pair of pistons, wrist pins, rings and circlips.

Harley-Davidson Accessories

#22711-04A

£340.80£306.72

Member£289.68-15%

Except for relieving the combustion chamber on stock 883 cylinder heads for correct compression ratio, these cylinders make the conversion to 1200cc a bolt-on operation. No cylinder head machining is required when used with Screamin' Eagle Cylinder Heads, or the 883/1200 Conversion Piston Kit. Cylinders are sold separately; two are required for the conversion. All EFI models require ECM calibration (priced separately). For race application only.

Harley-Davidson Accessories

#16954-02A

£331.82£298.64

Member£282.05-15%

3-7/8" Standard Bore. These Flat-Top Cast Pistons are designed for use with 3-7/8" Big Bore performance cylinders (1550). Kit includes rings, clips and pins.

Harley-Davidson Accessories

#22851-99A

£269.53£242.58

Member£229.10-15%

This multi-layered head gasket provides improved sealing for 3-7/8" Big Bore high performance engines. Sold in pairs.

Harley-Davidson Accessories

#16101-01

£56.76£51.08

Member£48.25-15%

Screamin' Eagle Stage IV Kit - 117CI to 131CI

Harley-Davidson Accessories

#92500146

£3.60£3.24

Member£3.06-15%

Screamin' Eagle Stage III - 121ci to 125ci

Harley-Davidson Accessories

#92500141

£2.40£2.16

Member£2.04-15%