Talked to Andrew this afternoon. We will run it on a simple NB2 engine, CA91,, VICS/Square top/Skunk2 all on the same day. Will post the results in a new thread. If it's good, we'll offer it on our site. If it's not good, we won't.
Based on what I can see in the pics and what they have published, it actually looks correct. We have had some rough CAD drawings for a BP IM project for years, just waiting for some free time between other big projects to start on it. Looks like ours.

 

I should have added the /sarcasm tags

 

Also keep in mind that these manifolds are thick as hell and can see major flow gains from porting.

 

The runners actually look like the correct length. My modified skunk2 pro street hangs straight out from the motor on a welded flange and I've had no issues over 2 years of motorsport and this on an engine that shakes everything loose! The cast plenum lid is pretty light.

I think these will work well for big boost and N/A builds with big cams like mine assuming the runner diameters are similar to the honda skunk2 manifolds.

 

In for results.

 

In for results too. The only real complaint we've had with the S2 manifolds for the K series is that the casting can be pretty rough and the ports can occasionally be a little off. The thermal gaskets usually need to be opened up a bit with a deburring tool as well.

But they generally make good power and as Josh said, they can be easily ported. My guess is that this will do pretty well for the Miata community.

 

At $400 if it at least matches the flat top performance wise these will probably sell.

 

I have one on the way as well for testing on my Rotrex car, very curious to see how these perform.

 

Controlled A/B testing or just sticking it on an tuning it?

 

Current dyno arrangement makes it a little difficult to A/B but going to do what I can to make that happen. Also swapping a Junk2 throttle body on at the same time, need to ditch the time bomb on there now.

 

I'll do an a/b on the dyno with my 300+ whp turbo car. Not the most desired data point, but it will probably be interesting. It will be a flat top comparison though.

 

That's good, that's what we want haha.

 

A. Baseline control OE TB + OE IM
B. Swap to S2 TB + OE IM
C. Swap to OE TB + S2 IM
D. S2 IM + S2 TB
E. Control verification
F. Reinstall highest performing combo

For science.

 

that sounds glorious. hoping it actually happens, cause we've been promised IM testing for quite some time now

 

I could also be persuaded to do a square top vs. square top killer comparison after all the e85 stuff is running gravy, however, I will be gone for two weeks.

 

Anyone else notice that they list 68 mm as intake bore at least on the MiataRoadster site and their Miata throttle bodies (which I have one of) are 64 mm? That seems like it might be a bit of an issue unless you used a different throttle body.

• 68mm throttle body opening

Does look like it might not be bad otherwise. I'd really like to see a comparison to the square top.

 

Non issue, the gasket should still work fine for the 64mm right?

 

Some dude named Eric Gonzalez claiming to work for junk2 just posted to a Facebook for sale group I watch about this intake. His post included this dyno plot of a turbo'd car. No other info given.

 

Interestingish... But the rev range that is more relevant is not shown and it doesn't specify which stock intake was used. I'll reserve my thoughts.

 

Nice gains in the midrange... the price is certainly right. Eagerly waiting on some reviews