Billet CNC Merge Collector Series Manifolds are here.
 

Just wanted to post this here, since my last thread I've had a few dozen PM's and emails asking for more info.

Here's a link to how to get involved. https://www.rx7club.com/vendor-class...nside-1091491/

Only $1100usd right now to get you hands on a Billet Series. People have been paying just less than that for the other common manifold option for years.


There Non-Billet Series manifolds are found here:
https://www.rx7club.com/vendor-class...npipe-1085128/


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Machined from a solid block of 304 stainless on a 5 axis CNC, they flow better than ANY merge collector on the market. Typically the tubes of a fabricated merge collector are hand formed into the shape of the T4 flange, and welded into place. That's not terrible, but you're limited to the sizing of the pipe (1.625ID), these units are built much wider than a pipe could ever be, allowing a perfect transition to the turbo flange. Then, when you weld the inside to be able to port it smooth, you bring the collector to welding temp again. Every time that happens, 304 stainless looses strength, particularly in the HAZ (Heat Affected Zone), and that's almost always where you'll see a crack form from. The runners of a manifold are fine to build this way, as long as they're welded properly, but the merge collector takes too much heat too many times for a small part.

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This isn't a sales gimmick, we're so sold out to this that we've changed our standard non-billet series manifolds to a CNC ported T4 flange that only requires one pass to weld, and has the porting already done perfectly by a CNC machine. The only difference is that the billet series will flow better due to not being restrained by pipe size. A more expensive piece to build, and we aren't changing the price at all.



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Here's a stress test taken from online, it shows the strength differences between a welded merge collector and a Billet piece. You can see the weak point is where the heat buildup from welding is. Even if welded properly, it's the reality.

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This is also taken from online, we do not sell or own this image, but these are the exact finish you'll see on these. The machine lines are in the same direction as the exhaust flow. Every detail has been worked out.



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Looks promising :) great quality work if it's exactly the same as pictured!

Will the merge collector and flange be available separately? I am planning to ditch my Aspec long runner manifold and build a shortie.

Jack

Excited to show the finished product!

Sorry not available separately. We only sell our welded hand ported flange. Shoot me a PM if you need one.

beautifuL!