{"product_id":"nissan-z32-300zx-twin-turbo-kit","title":"NISSAN Z32 300ZX Symmetrical Twin Turbo Kit","description":"\u003cp\u003e\u003cstrong\u003eThis is the first official production run for Polar Engineering Z32 twin turbo exhaust manifolds.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e\u003cspan\u003e***Update as of July 15th, 2026***\u003cbr\u003e***Orders are closed.***\u003cbr\u003e***A a production of a large batch (50+) of manifolds is now nearing completion. By the end of this month, we will finally have a firm ETA on when these will be delivered. As a result:\u003cbr\u003e1. \u003cu\u003eIf you have an outstanding order for exhaust manifolds\u003c\/u\u003e, you will receive a new email update from me by the end of this month and we will start making arrangements for delivery.\u003cbr\u003e2. If you are interested in ordering one of these kits, I expect to have around 8-15 sets available after all pending orders get taken care of. Those 8-15 kits will be available to purchase on first come, first served basis once they arrive from manufacturing.\u003cu\u003e I am not taking any new orders until then. No exceptions.\u003c\/u\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eIf your car is currently at a shop, sitting on a lift and waiting for manifolds, it is probably not the best idea to place an order and plan the rest of your build around these manifolds. Please plan your build ahead and understand that these are made in batches.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile I am giving an option to pre-order downpipes and heater pipes, you \u003cstrong\u003eDO NOT\u003c\/strong\u003e have to order them now. Early ordering lets me plan ahead with production better and have everything streamlined. It will be possible to order those later as we approach finishing stages of manifold production. At the same time, pre-ordering downpipes places your order higher up on the list which means that your downpipes will be delivered sooner.  The choice is totally up to you.\u003c\/p\u003e\n\u003cp\u003eTowards the end of October, a 3-inch dual intake setup will also be available for ordering. It will be a separate product that will work with this turbo kit, as well as previously available versions.\u003c\/p\u003e\n\u003cp\u003eManifolds will come ceramic coated black in their default configuration. If you are looking for a different color, please contact me \u003cstrong\u003eafter placing an order\u003c\/strong\u003e. I should be able to arrange most colors for you.\u003c\/p\u003e\n\u003cp\u003eI am limited on space in this section, so product description will be \u003cu\u003e\u003cstrong\u003esignificantly shortened\u003c\/strong\u003e\u003c\/u\u003e. \u003cu\u003e\u003cstrong\u003eFull product description and information about development is available in a separate BLOG posts. You can find the BLOG by following a link at the top of any page on this website.\u003c\/strong\u003e\u003c\/u\u003e\u003cstrong\u003e \u003c\/strong\u003eAdditionally, detailed posts are available on my Instagram and Facebook pages.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShort summary about this project:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAfter seeing an array of new generation of turbochargers released on the market in the last three years, it was evident that VG30DETT would benefit immensely from all these new releases and is naturally the next step in the Z32 platform development.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLet’s briefly talk about these manifolds:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e-Manifolds are CAD designed from scratch every step of the way. That allowed me to work around physical dimensions of cylinder head casting and develop free-flowing runners that taper out gradually from each runner inlet all the way towards manifold 3” v-band outlet flange. That greatly helps with exhaust gas reversion and is not possible to do with tubular manifolds. Turbocharger placement also clears factory oil filter trees.\u003c\/p\u003e\n\u003cp\u003e-I was also able to place the wastegate flange in the most favorable location given other physical constraints that I ran into. This kit was designed around Turbosmart 45mm GenV LITE wastegates, but enough room was allocated to run regular, taller Turbosmart 45mm wastegates as well as Tial MV-R and newest Garrett 45mm counterparts.\u003c\/p\u003e\n\u003cp\u003e-Almost perfectly symmetrical manifolds promote even flow through both VG30DETT cylinder heads and individual ports, allow mounting reverse-rotated turbocharger on USDM driver side and eliminating sharp 90-degree elbow off USDM driver side compressor housing. Cylinder #5 and #6 ports will no longer experience flow restrictions that are inherent to previous manifold designs.\u003c\/p\u003e\n\u003cp\u003e-Turbo position clears all parts of factory cylinder head castings with no need of grinding. Compressor inlet piping has been upgraded to 3” diameter and clears low profile engine mounts with no modifications. Inlet piping also clears all factory amenities like power steering pump and AC compressor.\u003c\/p\u003e\n\u003cp\u003e-Physical features: 6mm walls, 12mm flanges, 347 stainless steel casting. Thicker walls were made for superior strength and to allocate extra material in case these manifolds would need to be port matched to custom port sizes on cylinder heads. I would be able to extrude hone these in increments of 0.030” all around. There is plenty of strength and material for all foreseeable performance needs. Main face flange is machined in a single operation as well CNC drilling 6 mounting holes per manifold. Then, the manifold is moved on to a 4-axis mill to have two v-band flanges machined into the casting. You read it right, the flanges are machined directly into castings which eliminates any chance of warping and cracking that happens with weld-on flanges.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWHAT COMES WITH YOUR ORDER:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-One set of two exhaust manifolds (left and right side).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-Brand new hardware for installation (studs\/nuts), including shortened studs for rear mounting holes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-Optional downpipes and heater pipes are available as add-ons.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eFLOW DATA:\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eFinal flow numbers were:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003ePolar Engineering manifold\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003e73*F, 30.06 baro, 39%Hum Ambient\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eTested @ -28\"wc applied to manifold collector\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eManifold runner inlet radius 9mm\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eCal plate 232.1, reading 230\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eCal plate 287.4 reading 288\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eCFM readings are not adjusted for ambient air density\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003e----------------- Gasket centered\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eShort---------------------257\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eMiddle-------------------252\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eLong----------------------258\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePRODUCTION NOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- Manifolds are investment cast to achieve required dimensional accuracy and details\u003c\/p\u003e\n\u003cp\u003e-Alloy of choice is 347 stainless steel, which has superior characteristics for this application.\u003c\/p\u003e\n\u003cp\u003e-100% made in the USA, yes \u003cstrong\u003e100% USA made\u003c\/strong\u003e!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDOWNPIPE OPTIONS\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDownpipes are available in two options:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecirculated (pictured)\u003c\/strong\u003e - wastegate discharge is returned back into exhaust piping. This is a quieter option since all exhaust sounds are muffled. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen dump\u003c\/strong\u003e - wastegate discharge is released directly into atmosphere and is not muffled. This option is \u003cu\u003esignificantly louder and will definitely violate most local sound restrictions.\u003c\/u\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDISCLAIMER\u003c\/strong\u003e\u003cu\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eMany Polar Engineering parts, including all ignition system altering products, are sold for off-road use only. All performance modifications and installations are at the customers own risk.\u003c\/p\u003e\n\u003cp\u003ePolar Engineering or www.polarengineering.co hold no responsibility either implied or otherwise for mechanical, electrical or other failure when using any aftermarket performance products. Items sold for off-road use only are illegal in many states and provinces and are intended for racing vehicles which may never be used on a public road.\u003c\/p\u003e\n\u003cp\u003eBy purchasing any aftermarket performance product, the customer takes full responsibility for any use, and\/or misuse of the product and agrees that Polar Engineering or www.polarengineering.co holds no responsibility for any consequences, legal, or other, of such use and\/or misuse.\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Polar Engineering","offers":[{"title":"Default Title","offer_id":49283535601916,"sku":null,"price":1400.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/6690\/1244\/files\/image_d7fc35f3.png?v=1786986769","url":"https:\/\/polarengineering.myshopify.com\/products\/nissan-z32-300zx-twin-turbo-kit","provider":"Polar Engineering","version":"1.0","type":"link"}