Quote Originally Posted by ZeForce View Post
Im not knocking the Toda header at all, it is one of the best off the shelf headers you can get. I would actually prefer one over my "hytech production header" simply for the better ground clearance, regardless of any power gains/losses. But in my opinion $1400 is just a ridiculous amount to spend on a header for a street engine. I paid less than AU$700 for my rage/hytech header, no fitment issues and the quality was awesome. Moreover, I seriously doubt there would be very much difference in performance compared to a Toda header and even if there was I dont think it would be noticeable enough on the butt dyno to justify spending twice as much.

Just my 2c worth
I don't think we’re not on the same page here,
The thread is about unconventional interference headers.
I merely stated I prefer the TODA product. But I didn’t expand further than that.

The point I was making was that these production or knock-off headers they are not as good as the real deal they pretend to imitate.
This is particularly so when capacity, compression & cams are brought into the mix.
If you really want a really good unconventional interference header…
Buy the SSR or Hytech custom product.
The reason they works well is not just the pipe size & lengths.
It’s the attention to detail in the stepped primaries.
Without functioning stepped primaries, this design just falls down.
(aka cheap knock-offs)

As for whether you’d notice the difference swapping to a TODA header,
Actually, I know you would… & it’s the part throttle power & response you’d notice the most.
But this is digressing & off topic.

As for my stance on the performance of these “real” headers…
This isn’t a half baked opinion that I just made up,
It is an opinion is based on tuning many, many cars with loads of different combinations with every header under the sun over many years.
& flying in the face of internet myth, I can state as fact, of all of the larger B-series engines I’ve seen, the best performing ones have used TODA, SSR or Hytech headers.
To date, I’m yet to see a copy or replica header that impresses.
This is in relation to engines of 1800cc & larger, up to say 2150cc.
Our Super Sprint EG is 1 good example.
In any case, regardless of what I say, the copy headers will still flood the market,
People will still buy & use them.
I feel it really aught to be clarified though, if you spend a little more on the real thing…
It is actually worth it.

As a side note, it’s interesting to notice both SSR & Hytech use conventional (mathematically correct) interference headers for the other engine types they support.