{"product_id":"acl-race-series-rod-bearing-set-tight-clearance-hyundai-i30-n-veloster-n-elantra-n-kona-n-2-0t","title":"ACL Race Series Rod Bearing Set, Tight Clearance - Hyundai i30 N \/ Veloster N \/ Elantra N \/ Kona N 2.0T","description":"\u003cp\u003e\u003cstrong\u003eACL Race Series Rod Bearing Set, tight clearance\u003c\/strong\u003e — eight tri-metal big-end shells for the 2.0 litre Theta II turbo bottom end, machined with a thicker wall so the assembled engine runs \u003cstrong\u003e0.025 mm (0.001 in) less oil clearance\u003c\/strong\u003e than our standard set.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRead this before you order: this is a clearance grade, not an undersize bearing.\u003c\/strong\u003e ACL list it on the same table as the standard and extra-clearance sets, all three for a crankshaft at standard journal size. It is the tight mirror image of the extra-clearance set. \u003cstrong\u003eIf your crankshaft has been reground undersize, this is the wrong part.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWho it is for.\u003c\/strong\u003e Two kinds of engine. One is a build where you want a tighter oil film than standard for better control and stability. The other is a crankshaft that measures a whisker under standard from ordinary wear or a light polish, where the thicker shell brings clearance back into specification without a regrind.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment — ACL's own application guide names the i30 N.\u003c\/strong\u003e Hyundai i30 N 2018 on, Veloster N 2019-2022, Elantra N 2022-2026 and Kona N 2022-2023 — 2.0L Theta II turbo (G4KH). Journal and housing dimensions are unchanged from the standard set; only the wall thickness differs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrom ACL:\u003c\/strong\u003e tri-metal construction, with a lead-tin-copper overlay over a nickel barrier layer and a copper-lead-tin lining on SAE1010 high-tensile steel. The higher steel tensile strength improves bearing retention, and the increased eccentricity compensates for bore distortion and helps the hydrodynamic oil film form.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDetails:\u003c\/strong\u003e 8 shells, one pair per rod; standard journal size with 0.025 mm (0.001 in) reduced clearance; rod housing bore 51.000-51.018 mm; crank rod journal 47.954-47.972 mm; wall approximately 0.0125 mm thicker per shell than the standard set.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMixing grades is normal practice.\u003c\/strong\u003e ACL expect builders to mix adjacent grades on one journal to land on a target clearance — one tight shell paired with one standard shell halves the change, to 0.0125 mm (0.0005 in). The thicker shell goes in the most heavily loaded position, which on a connecting rod is the upper half.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRod bearings only.\u003c\/strong\u003e There are no main bearings in this set.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA note on appearance.\u003c\/strong\u003e Race Series shells arrive with a dark tarnished colouring that can look black, brown or blue. ACL applies no cosmetic tin flash. It is deliberate, and it is not a defect.\u003c\/p\u003e\n\u003cp\u003eFinal oil clearance is the engine builder's responsibility. Measure the assembled bearing bores before you commit, and never polish the bearing surface to change it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailability:\u003c\/strong\u003e ON ORDER at our distributor as of 6 November 2026.\u003c\/p\u003e\n\u003cp\u003eNot sure this suits your car? Ask us before ordering — we would rather check the fitment than process a return.\u003c\/p\u003e","brand":"ACL","offers":[{"title":"Default Title","offer_id":50961585832122,"sku":"ACL-4B1293H-.025","price":219.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0276\/1359\/3623\/files\/4B.jpg?v=1793898309","url":"https:\/\/n75motorsports.ca\/products\/acl-race-series-rod-bearing-set-tight-clearance-hyundai-i30-n-veloster-n-elantra-n-kona-n-2-0t","provider":"N75 MotorSports","version":"1.0","type":"link"}