Product Description Sifton Hydraulic Tappet Assembly Set For Harley Big Twin Features: Hydraulic type tappets Available .005 or .010 oversized Replaces OEM 18552-53 Sifton Hydraulic Tappet Assembly Set For Harley Big Twin 1953-1984 at RevZilla Browse all RevZilla deals $178.19 In Stock at RevZilla Buy Now at RevZilla Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Sifton Size +.005 Condition New MPN 10-0777 Sifton