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Do they bolt straight on to our stock catalytic converters?

Yes, but you should make sure that you confirm your exact model with the seller as there can be some variation.

J

There are so many good options locally, why go through the hassle of getting it in from the States?

Thanks J. They are very cheap Apu, and shipping is ok. Just after a 4-1 header and most are 4-2-1.

Hi.
Just remember most US extractors are to a degree compromised owing to the steering shaft on the left hand side ( the hot side )on Na & Nb and the problems with long primaries and collectors in a restricted space, You would be better off getting onto one of the buying groups and buy from yahoo japan secondhand or source locally.

ralt wrote:Hi.
Just remember most US extractors are to a degree compromised owing to the steering shaft on the left hand side ( the hot side )on Na & Nb and the problems with long primaries and collectors in a restricted space, You would be better off getting onto one of the buying groups and buy from yahoo japan secondhand or source locally.

Thoughts are that a RHD header into a LHD car like you said would be a problem and a LHD header into a RHD with the steering shaft now on the left hand side would be ok with the extra room.

Some of these US headers go for $120 US, I suppose they have a bigger market.

This was $399, 4-1. I have to fix a leak in my current HSK 4-2-1 item and that will cost @$200 with labour. Needs the flex section replaced, it is an awesome header but the slight leak is annoying and noticeable as you put down some revs initially. Will let you know how it goes in a few weeks time when it arrives. "Should fit". Be good to get a 4-1 to compare.

http://www.ebay.com.au/itm/CXRacing-Header-1989-1999-Miata-MX-5-NA-1-8L-Equal-Length-2-pcs-Vband-/271543748288?pt=Motors_Car_Truck_Parts_Accessories&hash=item3f3944c6c0

Those aren't equal length. At all. You can tell by looking at cyl 1 and cyl 4. Cyl 1 should be reasonably straight to the collector, and 4 would be curled up to make up the length. You should have spent you're money fixing the current headers.

plohl wrote:http://www.ebay.com.au/itm/CXRacing-Header-1989-1999-Miata-MX-5-NA-1-8L-Equal-Length-2-pcs-Vband-/271543748288?pt=Motors_Car_Truck_Parts_Accessories&hash=item3f3944c6c0

Those aren't equal length. At all. You can tell by looking at cyl 1 and cyl 4. Cyl 1 should be reasonably straight to the collector, and 4 would be curled up to make up the length. You should have spent you're money fixing the current headers.

They are tuned.

Do you even understand what tuned means?

No warranty aye.

I see these welds lasting a long time

SURE ARE CURLY.

plohl wrote:Do you even understand what tuned means?

Gas flow rates to the collector from each outlet. Arrive same time.

plohl wrote:Do you even understand what tuned means?

"Product Info and Spec:

Header:
1.65" Equal Length Runners"

they have a rather broad definition of "equal length".
Primary that should be the shortest is the longest and vice-versa.

Also, how exactly does the secondaries attach to the tertiary?

I'll go a review when I get it.

Don't brush it off because it is cheap and on E Bay. CX Racing has a huge range of products.

The more common 4-2-1 can go for $120.