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) 961329 The Hollywood is a remarkable

The Hollywood is a remarkable competition breathing bar with roots that go way back in time

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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) 961329 The Hollywood is a remarkableUsed 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.