{"product_id":"the-forge-spool-t3-t4-turbocharger","title":"The Forge Spool | T3\/T4 T04E .57 A\/R Turbocharger for 1.5L to 2.5L","description":"\u003cdiv class=\"product-narrative\"\u003e\n\u003cp\u003e\u003cstrong\u003eBoost is a negotiation between exhaust gas and intake charge.\u003c\/strong\u003e A turbocharger does not create power. It recovers energy that the engine was already throwing away and uses it to pack more air into the cylinder. The specification sheet is where that negotiation is written down, and reading it correctly is the difference between a build that spools cleanly and one that surges, stalls or eats itself.\u003c\/p\u003e\n\u003cp\u003eThis T3\/T4 T04E hybrid runs a 0.50 A\/R compressor housing with a 44 trim wheel, 50.5mm inducer and 76mm exducer, matched to a 0.57 A\/R turbine housing with a 73 trim wheel, 65.5mm inducer and 55.9mm exducer. That combination sits in the sweet spot for 1.5 to 2.5 litre four and six cylinder engines, delivering usable boost from the mid range rather than all of it in a narrow window at the top.\u003c\/p\u003e\n\u003cp\u003eThe flanges are the part that decides whether the install happens on a Saturday or a fortnight. A T3 four-bolt manifold flange and a standard T3 five-bolt downpipe flange mean off-the-shelf manifolds and downpipes fit without fabrication. Oil feed is M12 x 1.25 with twin M8 x 1.25 returns, the bearing is a floating journal type rather than a ball bearing cartridge, and the unit is oil cooled only, with no water lines to route.\u003c\/p\u003e\n\u003cp\u003eMaximum boost is 18 PSI, or 1.2 bar, with a supported output of 300 plus horsepower depending on supporting modifications. Two things should be stated plainly. There is no internal wastegate, so an external gate or a suitable actuator is required. And a turbo at this price is a journal-bearing unit built for a sensible boost target, not a 500 horsepower drag build. Treat it as the honest middle of the market and it will perform like it.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eAir is free. Getting more of it into the cylinder is where the engineering lives.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin:24px 0;border:0;border-top:1px solid #e8e8e8;\"\u003e\u003cdiv class=\"product-features\"\u003e\n\u003ch3\u003eWhat the Forge Spool Actually Does\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;margin:0;\"\u003e\n\u003cli style=\"padding:11px 0;border-bottom:1px solid #eee;\"\u003e✦ \u003cstrong\u003e0.50 A\/R compressor with 44 trim wheel\u003c\/strong\u003e, 50.5mm inducer and 76mm exducer for mid-range response.\u003c\/li\u003e\n\u003cli style=\"padding:11px 0;border-bottom:1px solid #eee;\"\u003e✦ \u003cstrong\u003e0.57 A\/R turbine with 73 trim wheel\u003c\/strong\u003e, 65.5mm inducer and 55.9mm exducer.\u003c\/li\u003e\n\u003cli style=\"padding:11px 0;border-bottom:1px solid #eee;\"\u003e✦ \u003cstrong\u003eT3 four-bolt manifold flange\u003c\/strong\u003e and standard T3 five-bolt downpipe flange for off-the-shelf fitment.\u003c\/li\u003e\n\u003cli style=\"padding:11px 0;border-bottom:1px solid #eee;\"\u003e✦ \u003cstrong\u003eUp to 18 PSI \/ 1.2 bar\u003c\/strong\u003e of boost supporting 300 plus horsepower with the right supporting modifications.\u003c\/li\u003e\n\u003cli style=\"padding:11px 0;border-bottom:1px solid #eee;\"\u003e✦ \u003cstrong\u003eFloating journal bearing\u003c\/strong\u003e and oil-cooled centre housing with no water lines to route.\u003c\/li\u003e\n\u003cli style=\"padding:11px 0;border-bottom:1px solid #eee;\"\u003e✦ \u003cstrong\u003eM12 x 1.25 oil inlet\u003c\/strong\u003e with twin M8 x 1.25 returns, cast housing with a durable steel wheel.\u003c\/li\u003e\n\u003cli style=\"padding:11px 0;border-bottom:1px solid #eee;\"\u003e✦ \u003cstrong\u003eFits 1.5L to 2.5L engines\u003c\/strong\u003e across four and six cylinder layouts, universal with minor modification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;margin:0;\"\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e T3\/T4 T04E, 0.57 A\/R turbine\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eCompressor:\u003c\/strong\u003e trim 44, A\/R 0.50, inducer 50.5 mm, exducer 76 mm\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eTurbine:\u003c\/strong\u003e trim 73, A\/R 0.57, inducer 65.5 mm, exducer 55.9 mm\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eManifold flange:\u003c\/strong\u003e T3 four-bolt pattern\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eDownpipe flange:\u003c\/strong\u003e standard T3 five-bolt pattern\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eBearing:\u003c\/strong\u003e floating journal bearing\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eCooling:\u003c\/strong\u003e oil cooled, no water ports\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eOil feed \/ return:\u003c\/strong\u003e M12 x 1.25 inlet, 2 x M8 x 1.25 outlet\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eMaximum boost:\u003c\/strong\u003e 18 PSI \/ 1.2 bar\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eSupported power:\u003c\/strong\u003e up to 300+ HP with supporting modifications\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eWastegate:\u003c\/strong\u003e not included, external gate or actuator required\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 27 x 25 x 23 cm, 7.6 kg\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e 1.5L to 2.5L, four and six cylinder engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-applications\"\u003e\n\u003ch3\u003eWhere It Belongs\u003c\/h3\u003e\n\u003cp\u003eBudget four cylinder builds use this turbo as the first forced induction step, because the T3 flange opens up the largest catalogue of manifolds and downpipes at reasonable prices. Drift and track cars running 1.6 to 2.0 litre engines pair it with an external wastegate for controllable boost delivery. Small displacement V6 projects use the 73 trim turbine to keep exhaust backpressure sensible. Fabricators keep one on the shelf as a mock-up unit for manifold jigs before committing to a more expensive cartridge, since the external dimensions are standard for the family.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-faq\"\u003e\n\u003ch3\u003eQuestions Buyers Ask Before Ordering\u003c\/h3\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need an external wastegate with this turbo?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. There is no internal wastegate, so boost control requires an external gate on the manifold or an actuator arrangement suited to your setup. Buying the turbo without budgeting for the gate is the most common planning error on this family.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What else has to change for a turbo install?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Fuel delivery, engine management, intercooling, oil feed and return lines, and usually the exhaust. A turbo alone does not add usable power if the ECU cannot add fuel for the extra air, and a lean condition under boost destroys pistons quickly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is 18 PSI safe on a stock engine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: On most stock engines, no. The 18 PSI figure is the turbo's limit, not a recommendation. Safe boost on an unopened engine is usually between 6 and 10 PSI, and it depends on compression ratio, fuel quality and tune. Set a conservative target and measure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Journal bearing versus ball bearing, does it matter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Ball bearings spool faster and tolerate higher shaft speeds; journal bearings are simpler, cheaper to rebuild and more tolerant of oil pressure variation. At this price point the journal cartridge is the honest choice and it suits a modest boost target well.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I plumb the oil feed and return?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Feed from a filtered pressure source through the M12 x 1.25 inlet, ideally with a restrictor, and return to the sump above the oil line through the M8 x 1.25 outlets. The return must drain by gravity with no low spots, which is where most installs go wrong.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is it a direct fit on my car?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: It is a universal unit, so fitment depends on the manifold and downpipe you pair it with rather than on the car itself. Vehicles with a factory turbo usually need a different flange pattern. For a stock engine, a bolt-on kit designed for the car is the simpler path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-gallery\" style=\"margin-top:30px;text-align:center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S2f76e81a54954e4d9f33c3d35af9413bM.webp?v=1770085723\" alt=\"T3 T4 T04E universal turbocharger\" style=\"max-width:100%;margin:8px auto;border-radius:6px;display:block;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S858b38dd33cc4cbebd2e60ad984acb86A.webp?v=1770085723\" alt=\"T3 T4 T04E universal turbocharger\" style=\"max-width:100%;margin:8px auto;border-radius:6px;display:block;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sa8016ad9468f462c9a0b88568684ca05H.webp?v=1770085724\" alt=\"T3 T4 T04E universal turbocharger\" style=\"max-width:100%;margin:8px auto;border-radius:6px;display:block;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sa89b064ad7174ee7bca613b568618e93L.webp?v=1770085724\" alt=\"T3 T4 T04E universal turbocharger\" style=\"max-width:100%;margin:8px auto;border-radius:6px;display:block;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sc6f1e80fd7ba48d0905574da564ac1f3G.webp?v=1770085723\" alt=\"T3 T4 T04E universal turbocharger\" style=\"max-width:100%;margin:8px auto;border-radius:6px;display:block;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S3a68c2483d9344c88d471c5487ab82ffG.webp?v=1770085724\" alt=\"T3 T4 T04E universal turbocharger\" style=\"max-width:100%;margin:8px auto;border-radius:6px;display:block;\" loading=\"lazy\"\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"Product\",\n\"name\":\"The Forge Spool | T3\/T4 T04E .57 A\/R Turbocharger for 1.5L to 2.5L\",\"sku\":\"MXR-T04E-57\",\"brand\":{\"@type\":\"Brand\",\"name\":\"MXR\"},\n\"description\":\"T3\/T4 T04E turbocharger with 0.50 A\/R compressor, 0.57 A\/R turbine, T3 four-bolt manifold flange and 18 PSI boost support for 1.5L to 2.5L engines.\",\n\"url\":\"https:\/\/eastsupplier.com\/products\/the-forge-spool-t3-t4-turbocharger\",\n\"image\":[\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S2f76e81a54954e4d9f33c3d35af9413bM.webp?v=1770085723\"],\n\"offers\":{\"@type\":\"Offer\",\"url\":\"https:\/\/eastsupplier.com\/products\/the-forge-spool-t3-t4-turbocharger\",\"priceCurrency\":\"USD\",\"price\":\"370.98\",\"availability\":\"https:\/\/schema.org\/InStock\",\"itemCondition\":\"https:\/\/schema.org\/NewCondition\",\"seller\":{\"@type\":\"Organization\",\"name\":\"EastSupplier\"}},\n\"manufacturer\":{\"@type\":\"Organization\",\"name\":\"MXR\"}}\n\u003c\/script\u003e","brand":"East Supplier Platform","offers":[{"title":"德国","offer_id":48414839111903,"sku":"1005006851078228-GERMANY","price":296.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S2f76e81a54954e4d9f33c3d35af9413bM.webp?v=1770085723","url":"https:\/\/eastsupplier.cn\/zh-cn\/products\/the-forge-spool-t3-t4-turbocharger","provider":"EastSupplier Platform","version":"1.0","type":"link"}