{"product_id":"acl-race-series-main-bearing-set-extra-clearance-hyundai-veloster-n-elantra-n-kona-n-2-0t","title":"ACL Race Series Main Bearing Set, Extra Clearance - Hyundai i30 N \/ Veloster N \/ Elantra N \/ Kona N 2.0T","description":"\u003cp\u003e\u003cstrong\u003eACL Race Series Main Bearing Set, extra oil clearance\u003c\/strong\u003e — the same ten tri-metal main shells as our standard set, machined with a thinner wall so the finished engine runs an extra 0.001 in (0.025 mm) of oil clearance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRead this before you order: this is the extra-clearance set.\u003c\/strong\u003e It is a specialist part for high to extreme power builds. On a standard crankshaft in a normal street engine it is the wrong choice — it costs oil pressure and can make the engine noisy on a cold start for no benefit. If your crank is finished to factory specification, buy our standard-clearance main set instead.\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). Clearance is a build choice, never a fitment choice, so this set fits exactly the same engine as the standard one.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat the extra clearance buys you, in ACL's words:\u003c\/strong\u003e additional oil flow through the bearings, to improve delivery to high load zones and improve cooling; room for increased housing distortion under very high inertial and firing loads; room for increased crankshaft flex under high load; and space for specialised anti-friction coatings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNo thrust washers are included.\u003c\/strong\u003e Ten shells only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDetails:\u003c\/strong\u003e 10 shells, 5 upper and 5 lower, positions 1 to 5; standard journal size, which is the only size ACL offers in this clearance; extra clearance of 0.001 in (0.025 mm) over standard; wall thickness 2.009 mm at the crown, 0.013 mm thinner per shell than the standard set; block tunnel bore 56.000-56.018 mm; crank main journal 51.942-51.960 mm; design vertical oil clearance 0.036-0.088 mm.\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 reach a target clearance — one extra-clearance shell paired with one standard shell halves the change, to 0.0005 in (0.0125 mm).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA note on appearance.\u003c\/strong\u003e Race Series shells arrive dark and tarnished, with no cosmetic tin flash. Deliberate, not a defect.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailability:\u003c\/strong\u003e ON ORDER at our distributor as of 5 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":50947974332602,"sku":"ACL-5M1295HX-STD","price":427.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0276\/1359\/3623\/files\/5M.jpg?v=1793898310","url":"https:\/\/n75motorsports.ca\/products\/acl-race-series-main-bearing-set-extra-clearance-hyundai-veloster-n-elantra-n-kona-n-2-0t","provider":"N75 MotorSports","version":"1.0","type":"link"}