{"product_id":"true-north-turbos-tnt485-85mm-t4-1-25","title":"True North Turbos TNT485 85mm T4 1.25 Journal Bearing Turbo | 1400-1520HP","description":"\u003cp\u003eThe TNT485 puts an 85mm compressor at the top of the 400 frame — a journal bearing turbo supporting 1,520+ HP on your average sub-6.0L pushrod V8, equally at home on LS and big-block swaps, import six-cylinder builds, and high-performance diesel trucks.\u003c\/p\u003e\n\u003cp\u003eIt pairs our newest 85mm compressor wheel with our 96x88 turbine wheel, developed through extensive research to relieve the backpressure that comes with maxing out the standard BW 96x88 design.\u003c\/p\u003e\n\u003cp\u003eThe 85mm sits just below the 88mm at the top of the range, trading a little peak airflow for slightly earlier response — a good pick if the 88 feels like more turbo than your combination can light.\u003c\/p\u003e\n\u003ch2\u003eKey Specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e85mm compressor wheel, journal bearing\u003c\/li\u003e\n\u003cli\u003e96x88 turbine wheel\u003c\/li\u003e\n\u003cli\u003eT4 flange, 1.25 A\/R\u003c\/li\u003e\n\u003cli\u003eRated 1,520+ HP on sub-6.0L pushrod V8 applications\u003c\/li\u003e\n\u003cli\u003eBuilt to order\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eReplaces \/ Cross-Reference\u003c\/h2\u003e\n\u003cp\u003eThe TNT485 is a \u003cstrong\u003edirect bolt-on replacement for S483 and S485\u003c\/strong\u003e turbochargers and other 85mm \u003ca href=\"https:\/\/blacksheepindustries.ca\/pages\/s400-turbo-guide\"\u003eS400-frame\u003c\/a\u003e units. Built on the same 400 frame, it uses the mounting hardware you already have:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTurbine inlet:\u003c\/strong\u003e T4 — fits your existing T4 manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTurbine discharge:\u003c\/strong\u003e 4.62\" (117mm) half marmon — \u003ca href=\"https:\/\/blacksheepindustries.ca\/pages\/s400-turbo-flange-guide\"\u003esame flange and clamp\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressor discharge:\u003c\/strong\u003e V-band, sized to your charge pipe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil drain:\u003c\/strong\u003e 50.8mm (2.00\") bolt centre, 12AN port — \u003ca href=\"https:\/\/blacksheepindustries.ca\/pages\/s400-turbo-oil-drain-guide\"\u003esame drain\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFull model mapping: \u003ca href=\"https:\/\/blacksheepindustries.ca\/pages\/s400-replacement-turbo-cross-reference\"\u003eS400 replacement cross-reference\u003c\/a\u003e. Housing selection: \u003ca href=\"https:\/\/blacksheepindustries.ca\/pages\/s400-turbine-housing-ar-guide\"\u003eA\/R guide\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs the TNT485 a direct replacement for an S485?\u003c\/h3\u003e\n\u003cp\u003eYes. The TNT485 is built on the 400 frame, so it is a direct bolt-on replacement for S483 and S485 turbochargers. Your T4 manifold, half marmon downpipe flange, clamp, compressor discharge and 12AN oil drain all carry over.\u003c\/p\u003e\n\u003ch3\u003eWhat is the TNT485 T4 1.25 rated for?\u003c\/h3\u003e\n\u003cp\u003e1,520+ HP on your average sub-6.0L pushrod V8, using our 96x88 turbine wheel on a T4 1.25 A\/R flange. The same frame is used across gas, import and diesel builds.\u003c\/p\u003e\n\u003ch3\u003eShould I run the 85mm or the 88mm?\u003c\/h3\u003e\n\u003cp\u003eThe 88mm has a slightly higher airflow ceiling; the 85mm responds marginally earlier. If your combination struggles to light an 88, the 85 is the safer pick.\u003c\/p\u003e\n\u003ch3\u003eIs this turbo built to order?\u003c\/h3\u003e\n\u003cp\u003eYes. Every TNT485 is built to order.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003ePower ratings on this page are quoted in crank horsepower (HP). Figures previously published in wheel horsepower (WHP) have been restated using our in-house tested conversion — the hardware and its capability are unchanged.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eBorgWarner and S400 are trademarks of BorgWarner Inc. Black Sheep Industries Inc. and True North Turbos are not affiliated with or endorsed by BorgWarner Inc. Model designations are used for identification and fitment reference only.\u003c\/em\u003e\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"Product\",\n      \"@id\": \"https:\/\/blacksheepindustries.ca\/products\/true-north-turbos-tnt485-85mm-t4-1-25#product\",\n      \"name\": \"True North Turbos TNT485 85mm T4 1.25 Journal Bearing Turbo | 1520+HP\",\n      \"description\": \"TNT485 85mm T4 1.25 journal bearing turbo, a direct bolt-on replacement for S483\/S485 and S400-frame applications. 96x88 turbine wheel. Rated 1,520+ HP on sub-6.0L pushrod V8 applications. Built to order.\",\n      \"brand\": {\"@type\": \"Brand\", \"name\": \"True North Turbos\"},\n      \"manufacturer\": {\"@type\": \"Organization\", \"name\": \"Black Sheep Industries Inc.\", \"url\": \"https:\/\/blacksheepindustries.ca\/\"},\n      \"category\": \"Turbocharger\",\n      \"sku\": \"TNT4859688125\",\n      \"mpn\": \"TNT4859688125\",\n      \"url\": \"https:\/\/blacksheepindustries.ca\/products\/true-north-turbos-tnt485-85mm-t4-1-25\",\n      \"additionalProperty\": [\n        {\"@type\": \"PropertyValue\", \"name\": \"Compressor Wheel\", \"value\": \"85mm\"},\n        {\"@type\": \"PropertyValue\", \"name\": \"Turbine Wheel\", \"value\": \"96x88\"},\n        {\"@type\": \"PropertyValue\", \"name\": \"Bearing Type\", \"value\": \"Journal Bearing\"},\n        {\"@type\": \"PropertyValue\", \"name\": \"Flange\", \"value\": \"T4, 1.25 A\/R\"},\n        {\"@type\": \"PropertyValue\", \"name\": \"Horsepower Rating\", \"value\": \"1,520+ HP\"},\n        {\"@type\": \"PropertyValue\", \"name\": \"Replaces\", \"value\": \"S483, S485 and 85mm S400-frame turbochargers\"},\n        {\"@type\": \"PropertyValue\", \"name\": \"Frame\", \"value\": \"400 frame\"}\n      ]\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"True North Turbos","offers":[{"title":"Default Title","offer_id":42652209447112,"sku":"TNT4859688125","price":2199.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0090\/2345\/5290\/files\/rn-image_picker_lib_temp_07d8c10d-99dc-425f-bd7d-40144f807f21.png?v=1784747670","url":"https:\/\/blacksheepindustries.ca\/products\/true-north-turbos-tnt485-85mm-t4-1-25","provider":"Black Sheep Industries Inc.","version":"1.0","type":"link"}