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Sean Dezart

Stainless Steel Exhaust Manifolds, Exhaust And Jdm Twin-Pipe Rear Silencer.

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Sean Dézart, in and around Zs for 26 years now, current President of the French Datsun club (with nearly 1300 members - not all active of course), previous Dutch Z club member for 4 years and before that Chairman and events organiser of the UK Z club.


 


Around 4 years ago I discovered that nobody was marketing reasonably priced s-steel exhausts so I set to it. Yes, there was a make and I was in contact with Judy at Stahl but they stopped and their header was already $900 before shipping and yes, there is Kameari and Fujitsubo but, a) their exhaust range is limited I feel and cool.png it all costs the donation of a small child !


 


I've sold modestly into Europe since and developped and evolved the goods until now I feel confident to sell to a larger and more distant market.


 


In the range currently are :


 


1 3/4" primary pipe Full-race header : US$799


1 5/8" primary pipe Race-sport header : US$661


1 5/8" primary pipe Street-sport header : US$537


Full 2.5" exhaust line with standard rear muffler : US$559


JDM twin-exit rear muffler : US$160


 


I'm looking at less expensive methods of shipping, currently US$380 (tracked and insured) for a header and exhaust (with standard rear muffler) and JDM rear muffler.


 


I'll be very happy to answer any and all questions.


 


Best regards,


 


Sean


 


ps this thread also got me thinking.....: http://www.viczcar.com/forum/topic/5610-240z-exhaust-hurricane-headers/


 


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Quality looks nice.

 

Question: Why did to decide to copy the Stal design headers? It's well known to us Aussies that it doesn't work as well as other brands...

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With the way our Pacifc Peso is, to the USDollar r the YooRow, it would be far more sense to get headers made here in Aus, and ship from here.

For us to purchase, the exchange rate is a killer, then add rapeage for shipping costs!

 

The above are not that dissimilar to the current Stew Wilkins units,but the LHD aspect of the above has them designed accordingly to miss bits f steering shaft and/or later 280zx with recirc steering.

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Quality looks nice.

 

Question: Why did to decide to copy the Stal design headers? It's well known to us Aussies that it doesn't work as well as other brands...

 

 

These (I believe) are actually copies of the Nissan motorsport race headers and street headers, and look like a very good replica too (at initial glance).

 

I have pictures of these in a book at home I can scan for comparison.

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These (I believe) are actually copies of the Nissan motorsport race headers and street headers, and look like a very good replica too (at initial glance).

 

I have pictures of these in a book at home I can scan for comparison.

Indeed the Race versions (both 1 5/8 and 1 3/4 are), the street-sport 1 5/8 I'll leave it to you guys to decide.

 

Stahl : http://www.stahlheaders.com/Frame%20New%20RR.htm US$910 !

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These (I believe) are actually copies of the Nissan motorsport race headers and street headers, and look like a very good replica too (at initial glance).

 

I have pictures of these in a book at home I can scan for comparison.

 

Pictures attached !

 

 

 

Best prices for shipping (via DHL with insurance) are as follows :

 

JDM rear silencer : AUS$135

 

Street-sport manifold : AUS$401

 

Full race and Race-sport manifolds : AUS$432

 

Combined manifold and exhaust line* : AUS$605

 

*can also include the JDM rear silencer.

 

 

I've produced a 2+2 extension pipe to allow all the above to be fitted on S30 2+2s (MX2-074-F on the attached photo).

 

I've almost sold out the current batch (within 1 month of them arriving) - the next batch is planned for December and will include the optional quieter classic and JDM rear silencers (in order to pass the ever-stricter track-day noise-level tests).

 

 

Any questions welcome. :-)

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Latest (2017) prices.

 

I continue to evolve the parts and develop the range available and those parts marked '" * " are already being produced and will be available later in the year.

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Hi.

 

A little bit of news and an update of my prices.

 

Unfortunately, with the way the € is performing against foreign currencies, I’ve had to readdress prices with an inevitable but modest (2.5-ish %) increase.

As a good gesture, anyone with the intention to buy can do so now (against an August delivery) and pay using the previous prices !

 

I have some parts still in stock – the rest will be available from mid-August.

 

Included now on the list are my new 280ZX parts and extra S30 rear silencer options.

 

In 2018, I’m hoping to offer a choice of S30 downpipes and also an L28ET header and downpipe.

 

Kind regards,

 

Sean

 

ps thanks to you all ofhere who've already awarded me your confidence with a purchase - don't forget that I offer a full, after-sales service (if at all needed).

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Hi chaps.

 

Been a while and I'm sure that you've been as busy as I have elsewhere.

 

The last batch sold out within 2x months and the latest has just arrived meaning that my garage once again becomes a rich 'dump' of cardboard and stainless-steel !

 

If anyone is interested, not all was pre-paid and reserved.

 

Cheers.

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Gosh - I haven't seen this year go by - so busy.

Next batch available in January and a lot pre-sold with the current -15% discount.

I've done some tweaks here and there for better fitting, finished the Fast-Road header and produced a limited run of stainless-tubular L28ET headers.

I still haven't got around to finishing the S30 downpipes between the stock manifold and my exhaust line - that's next !

 

I did finally sit down and produce a map of clients - not too much detail as I don't want anyones' car stolen but a fun way to see how well you know your neighbours, here it is up to date* :

https://www.mapcustomizer.com/map/Zstory exhaust customers

*however, I might I have some of you - if so, please contact me via an PM.

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Zstory wishes all its past, current and future customers, families and friends a Happy and, above all, healthy 2019 !

I have some disappointing news to annonce – my next batch won’t be available until end-February and I’ve had to postpone production of my new L28ETurbo manifold for flange compatability issues which cost me some delays, not helped by the Christmas and New Year holiday shutdown.

I sincerely apologise for this delay of a month and invite anyone, for whom this presents a problem to contact me via PM.

Please rest assured that once they arrive, I will do my very best to expediate tham asap.

Best regards and once again, my apologies.

Sean

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California exhaust law 95dB !

 

https://jalopnik.com/why-people-are-suddenly-freaking-out-over-californias-e-1831620651

 

 

1)      Existing law requires every motor vehicle subject to registration to be equipped with an adequate muffler in constant operation and properly maintained to prevent any excessive or unusual noise and prohibits a muffler or exhaust system from being equipped with a cutout, bypass, or similar device.

2)      Existing law further prohibits the modification of an exhaust system of a motor vehicle in a manner that will amplify or increase the noise emitted by the motor of the vehicle so that the vehicle exceeds existing noise limits.

How do cops decide if my exhaust is illegal?

There are two things the state of California cares about when it comes to your car’s exhaust: How loud it is and how much it pollutes. Biannual smog testing means your car has to pass an emission test to stay street legal, but noise enforcement is a little more vague.

Per California Highway Patrol Bulletin NO.98-100: “Excessive Noise is primarily a nuisance issue rather than a safety concern, and determination of excessive noise is subjective. For this reason, enforcement personnel are to exercise sound professional judgment in making a determination of violation.”

So how exactly do they measure 95 dB?

Practically speaking it’s going to come down to the cop. If they think you sound too loud, they can pull you over and slap you with a ticket. So those of you with wide pipes might be wise to coast with your clutch in when you pass a parked police car.

What does that mean in plain English?

Before 2019, California cops could pull you over for having a loud exhaust but they would issue a “fix-it ticket.” That means that if you went back to them with a stock exhaust reinstalled within a certain amount of time, you would be free and clear.

Police are not allowed to do that anymore, and now will just give you a violation on the spot !

 

 

 

Cali sets the trend – what happens there spreads out across the country and often further around the world !

 

We all love the sound of our inline sixes whether it be burbling on tickover, running up through the torque-rich low to mid-range revs or hunting the last few horses bouncing off the red line with the rev limiter flashing.

 

But we must face todays’ reality that pollution is poltically incorrect and where ‘they’ can’t get us on content as our cars are classics, they can on noise-pollution !

 

Stock, OEM exhausts are NLA and who’d want them, especially after we’ve improved our engines – no-one wants to strangle the engines’ potentiel.

 

There are many choices off the shelf for after-market exhausts and many local shops will make and fit up what you want….the knack is to get the right package !

 

Here in Europe, the laws have been getting steadily more strict to the point where one asks oneself if it’s just a machivelian method of remowing all old cars from road, classics or not !

 

Most circuits have a dB limit which one must pass before being allowed on, others have certain noise detectors around the circuit pinpointing ‘abusive’ cars and certain are allowed a specific dB level throughout the year and once reached, their credit is up until the end of the year. Obviously these latter don’t want to lose valuable hiring days and so enforce strict controls !

 

The tendancy is therefore to lower the dB limits which may penalise many owners, in towns, cities, certain periods of the day and circuits which have remained hollowed places at which to enjoy our sportscars.

 

Solutions ?

 

Even kept in the best condition, certain after-market exhaust lines (and I include headers in a ‘complete’ exhaust line) are just not conceived to be quiet !

Sold mostly to enhance performance, the free-flow exhausts with no intemediate silencer box and a glass-pack or expansion ‘muffler’ at the rear merely make more noise than power, completely ignoring certain physcial rules about velocity, scavenging and harmonics leading to exhaust drone.

 

I remember fitting a Twice-pipes line to a 6-2 header back in 1991 – I loved it and boy was it loud ; I remember being flagged down by a cop for having ‘pulled away too agressively from the sidewalk’ when I was only doing 25mp/h and having to dip the clutch to rapidly lower the engine revs whilst in the vicinity of others and late at night coming home. Great days but more complicated now……

 

It’s surprising when someone spends good money of their paint, nice wheels, interior, engine, brake and suspension upgrades and then refit the 20year old header connected to one the cheapest exhaust lines available online !

 

Your cars’ complete exhaust has as much importance as your choice of induction – twin carbs, triples, 4barrel, injection, ITBs, turbo (s) ?

 

Accordingly, it should be chosen with care, with the long-term in mind as no-one likes spending twice and, as I always advise, with your end use in mind !

 

I’m working on a guide to understanding exhaust mechanics, something simple to read albeit complete. I believe that there isn’t enough unbiased information out there to properly advise users.

 

Db limits of my mufflers using a resonator and measured on a Rebello L32 with triple 44 Mikunis !

 

 

 

 

 

 

Engine revs

resonator

Muffler

at 50cm

at 1m

4000

Yes

Classic

98

95

4000

Yes

JDM

           100

98

4000

Yes

Trackday

96

96

4000

Yes

Street

94

91

 

Later on this year, I’ll be adding a fifth muffler type to my range ; the ‘Hako’, a horizontal twin-exit muffler which can expected to sound similar to my JDM.

 

My Street and Trackday share the same exterior form, the Street being baffled whereas the Trackday is an expansion box as per the Classic, JDM and Hako.

 

Choose wisely.

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So, this is the definitive part in prototype form - it'll look a whole lot better after production :-) !

Hako muffler.

AUS$286 (+ shipping)

I shall be doing a limited run of 20x initially, orders for all catalogue parts currently being taken, available in October, maybe September.

My L28ET header will also be available then.

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