Hastings, 2-3/4" bore piston ring set. +.030" - 50-73 45" (750cc) Flathead; all 52-56 K 45" (750cc) and KH, KHK 55" (900cc) Flathead models (NU) 561432 *Type B' gasket was introduced

*Type B' gasket was introduced on Evolution XL Sportster models in 1986

so you can legally scramblerize your 1200 Sportster or Softail that needs to be driven off or on the road

OEM replacement reference 11119

Pros: Organic friction material offers very predictable stopping power

Hastings, 2-3/4" bore piston ring set. +.030" - 50-73 45" (750cc) Flathead; all 52-56 K 45" (750cc) and KH, KHK 55" (900cc) Flathead models (NU) 561432 *Type B' gasket was introducedUsed with late style 1950 1973 type pistons with 1 16" gray iron parkerized compression rings and the 3 piece flex vent style chrome oil rings. Also fits 52 56 K, KH, KHK 55" (900cc) Flathead models. Std Bore: 2. 745" (69. 723mm). 1st ring: 1. 6mm. 2nd ring: 1. 6mm. oil ring: 4. 75mm. Note: OEM 1929 1949 pistons are equipped with 3 32" (2. 3mm) 1st. & 2nd rings and 1 8" (3. 2mm) oil ring, for these Hastings rings see 1950 1973 Flathead model years.