{"product_id":"hastings-3-7-8-chr-moly-piston-ring-set-010-915352","title":"Hastings, 3-7\/8\" Chr\/moly Piston Ring Set. +.010\"","description":"\u003cp\u003eReplacement for 99-06 Twin Cam models that are equipped with the 95\" (1550cc) 3-7\/8\" OEM big bore kit. Also fits 07-17 Twin Cam 103\" (1690cc) engine. Std cyl. bore: 3.875\" (98.425mm). 1st ring: 1.5mm. 2nd ring: 1.5mm. oil ring: 2.5mm. Tech tip: Piston grooves vs piston rings. It's not difficult to determine if a Hastings piston ring set will fit a certain piston. You should measure the height of the piston groove in the piston itself. The 2 top grooves will be for compression rings; the lower groove will be for the oil ring. In most cases Hastings oil rings are of the low tension 3-piece flex vent type. Ring heights are listed for reference. Tech tip: Piston oversizes. For each oversize cylinder diameter will increase with.010\" (0.254mm). The standard bore of the cylinder is listed for reference. (Information provided by Hastings Manufacturing Company; Inc.)\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 99-06 (NU) Twin Cam A\/B with 1550CC (95\") Big Bore; 07-17 Twin Cam 103\" engine\u003c\/p\u003e\u003cp\u003eSuitable where the listed fitment matches.\u003c\/p\u003e","brand":"Hastings","offers":[{"title":"Default Title","offer_id":57518363640183,"sku":"915352","price":67.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/4619\/3127\/files\/908440k.jpg?v=1791378822","url":"https:\/\/www.pedrosparts.co.uk\/products\/hastings-3-7-8-chr-moly-piston-ring-set-010-915352","provider":"Pedro's Parts","version":"1.0","type":"link"}