Forged 3 5/8" Bore Piston Kits for 1984-'99 HD® Big Twin 103" Stock Style Heads components Getting proper trail is critical

Getting proper trail is critical to getting a great handling bike

slim wrap steel fender

1998 – 2006

5" slimmer than H-D's chopped pak

Each filter features an inverted pleated top and is handmade from black synthetic filter element wrapped in a stainless steel mesh for airflow coming in from all directions

Forged 3 5/8" Bore Piston Kits for 1984-'99 HD® Big Twin 103" Stock Style Heads components Getting proper trail is criticalThese forged, 3 5 8" big bore flat topped pistons are used in S&S Sidewinder kits and Hot Set Up Kits for HD Evolution big twins with stock cylinder heads and 4 1 4" and 4 1 2"stroke engines with stock diameter (8 1 2") flywheels and 4 3 4" stroke engines with 8 1 4" diameter flywheels. 3 5 8" bore.