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Radium Engineering Lotus Elise/Exige (2ZZ-GE) Radium Turbo Exhaust Manifold - Polished

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SKU: rad12-0005-01
Part Number: 12-0005-01
Notes: Turbo Exhaust Manifold
Manufacturer: Radium Engineering
Color: Polished

Product Category: Turbo Manifolds

Our Price: $854.00

StartYear EndYear Make Model SubModel Cyl Lit Fuel FuelDel ASP EngDesg Notes


Radium Turbo Exhaust Manifold: Stainless steel exhaust manifold with T3 flange for the Toyota 2ZZ-GE engine, designed and produced by Radium Engineering. The T3 turbo flange is tapped for M10x1.5 studs (not included).

*Engineering Design*
This exhaust manifold was CAD designed and flow analyzed for maximum performance in a compact package.

Turbocharger placement was carefully evaluated to make turbo kit installation simple. The turbocharger is located high enough to promote low resistance oil return back into the oil pan, exhaust downpipe easily clears the subframe, and turbocharger air inlet clears the transmission shifter cables.

Furthermore, the placement away from the head allows larger radius primary exhaust runners. Manifold mounting holes are designed to allow the manifold to expand without inducing stresses on the fasteners.

A casting manufacturing process was chosen for high repeatability suited for volume production without the inconsistencies commonly found with fabricated manifolds. Lost wax (investment) casting process was chosen over a low quality sand casting because of its superior surface finish, tight tolerance holding, and the absence of a parting line. Every manifold is CNC machined to precise dimensions to ensure a perfect fit every time.

After casting, there are 3 relief cuts machined into the head flange to separate the exhaust ports, as shown. This allows thermal expansion and resists flange warping. It also relieves and frees up any stress after the part was cooled in the casting process. Next, the head flange and T3 flange is fly cut to be true and flat, as shown. Lastly, four M10x1.5mm threads are machined for mating the T3 turbocharger.

347 stainless steel was used for its high thermal capacity, low thermal conductivity, and resistance to thermal cycling. Additionally, this material will not rust, but will change color when it is heat cycled for the first time.

*Thermal Wrap*
It is highly recommended to use this custom heat barrier designed to keep heat away from sensitive chassis components.

Because Stainless Steel will not corrode these manifolds can be polished to a highly reflective "show quality" surface finish.


Additional Information

Manufacturer Description
We are an aftermarket automotive company located in the Pacific Northwest that designs and produces quality performance products. A team with personal passions for innovation leads Radium towards advancement in the industry.

With a BSME from the University of South Florida, JP has a long history in the automotive industry. His career began as an engineer at Advanced Engine Management (AEM) for 12 years which provided intimate knowledge of engine management electronics and advanced dyno tuning concepts. JP also designed, launched and maintained an innovative turbocharger product line for a market leader in BMW forced induction at HPF for 5 years.

Aaron graduated from Oregon State University with a degree in Mechanical Engineering in 2002. His career in the vehicle industry has taken him to several leading automotive companies including AEM, HPF, WARN Industries and Daimler. Aaron has also worked in the aerospace and military vehicle industries.

After obtaining a bachelor’s from USF, Tina is currently pursuing an MBA at Portland State University. Her specialized skills ensure the business is properly managed, purchasing and inventory is organized, and the dealer network is standardized with a solid structure.

With thorough research and development utilizing state of the art equipment, Radium designs all products in-house with the goal to enhance the driving experience and solve problems that keep vehicles from reaching their full potential. Extensive testing and evaluation ensures the durability and integrity of Radium products exceed consumer expectations.

Currently, Radium manufactures an expanding collection of motorsport parts and accessories for high performance and racing focusing on their revolutionary fuel surge tank line and PCV oil catch can systems. An ever expanding collection of application specific parts are also being created. Please contact Radium for more information.
Manufacturer Part Number 12-0005-01
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