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The Speed Forge

EZ30D High Clearance exhaust Manifold

EZ30D High Clearance exhaust Manifold

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COMING SOON!!

This manifold is not for the faint of heart; we designed it with a single purpose in mind. That purpose is to maximize ground clearance. Whether you're looking to take your car off-road or if you've built a slammed Subaru with an EZ30D, this manifold is for you! 

The design:
We built this not just with clearance in mind, but to suit those who have manual swapped their EZ cars. Currently, the fitment of automatic vehicles is unknown, but it is likely to be incorrect. This manifold features a stainless steel flange-to-flange design. We used 16-gauge 304 stainless steel, with every weld back purged, to create the strongest product possible. With 2" primaries and 2.5" output, a modest performance increase can be expected.
At the termination of the primaries, we used a Vibrant 2-1 collector with a 2.5" V-band clamp, roughly online with the front of the transmission cross member. The reason the manifold terminates so far forward is dual purpose. Firstly, the manifold does not have flex bellows built in. Due to the short length of the manifold, they are not necessary. Secondly, this allows us to offer a variety of mid-pipes to suit a multitude of platforms. Rather than reducing directly from the exhaust flange and turning, we built to turn directly off of the head and reduced en route to the cross member. This allows us to tuck the primaries as close as possible to the engine. Then, we built a crossover primary, making this an unequal-length manifold. While this may not be ideal for those seeking to extract every last horsepower from the engine, it still offers improved performance over the stock manifold and increases ground clearance. We used heat sink O2 sensor bungs at the heads and a standard O2 bung at the merge.

This manifold is NOT for street use. It is not DOT-approved, does not have catalytic converters, and is recommended for off-road/track use ONLY.


This product is still in beta testing. This means we are currently testing the prototype extensively to identify weak points. We intend to make a couple of minor design changes to make it a more universally fitting product. The prototype is polished. However, we strongly recommend cerakoting (which we will offer to facilitate) due to the proximity to the engine, and steering components. 

We anticipate launching this product in early to mid-July 2025. At the present moment, we cannot list a price, as we have not built this product off of a fixture. Building a product on a car is time-consuming and expensive. Once we can make one on the table, we can see how long it takes and provide a price that is not just speculation. Stay tuned!

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