HOTSHOTvs.GREDDY headers (company comments)

[240sxSE]

I emailed both Hotshot and Greddy and the people their from the company had this to say:

Orginal message sent: I was recently aware that the headers for the 1995 Nissan 240sx were being redesigned, The currently available headers that are stainless steel, are they the newly redesigned product. If not, then please notify my if you currently are redesigning the header. As a member of both az240sx.org, socal240.org, and 240sx.org, I would like your comment on how well your headers for the 240sx match up to the ceramic coated headers by Hotshot. How do you comment on the rumor that your headers have a tendency to crack.

Greddy: Unfortunately we did run into a bit of a problem with the earlier design of 240SX header. The header is made from quality materials and has quality weld, but because the USA spec 240SX does not have a flex joint in its exhaust system it has a tendency to be very hard on the exhaust manifold, I have even heard of heavy stock cast manifolds cracking. But in any case we are working on a new revision for that header which should be re-released later this ear. Please keep in touch with your favorite Authorized Greddy dealer for more updates. http://greddy.com/dealers/

Orginal message sent to Hotshot: I have a 1995 Nissan 240sx, I would like to know how your header competes with Greddy Stainless steel header for the 240sx. How would you like to comment to the rumors/forum that the Hotshot header has bad fitment problems, required removal of cat, and that they have a tendency to crack and not last.

HOTSHOT: HI Update your research, all fitment problems have been corrected over a year ago. Greddy no longer offers their header because of cracking, not us.

Thanks

HotshotWhat header would you get?

[nlzmo400r]

i know hotshots are good headers, not matter what application really, and im sure GREDDY will be great as well, i suspect Greddy to be a lil more expensive cuz of the name

[Aries]

sounds like John with HotShot answered your question best.Theirs is still sold for a reason...

[C-Kwik]

I suspect Greddy's headers cracked due to expansion. Stainless steel expands more than mild steel or cast manifolds. I believe the flange is one piece. Cutting reliefs into the flange similar to a turbo manifold may solve the problem. It's purely speculation on my part though.

[I am Technoman]

I had three of them and they all cracked. Greddy was cool about it after the 2nd one cracked they shipped overnight Sat delivery from CA to my moms house in MS so I could drive back to Fl. I have nothing bad to say about Greddy. I spoke with an engineer who seem to know a lot about the header such as the Mitsubishi GS has the same collector and never breaks but for some reason it will break every time at the collector on a 240. After I talked to the guy the following Monday the header was on back order. I think the collector cracks because the KA motor seams to want to shake allot putting stress on the collector.

[Turbo_Nismo_EC]

Hi, I am just curious, but what is cutting reliefs in the flange? I would like to prolong the life of my header by any means possible. Please explain what you mean by cutting reliefs. Thanks

[I am Technoman]

Hi, I am just curious, but what is cutting reliefs in the flange? I would like to prolong the life of my header by any means possible. Please explain what you mean by cutting reliefs. Thanks

How long have you been using the Greddy header?

Cutting relief’s in the flange is when you separate the headers from each other by cutting the flange in between each runner.

[Scott McLellan]

"GReddy Headers. All GReddy headers are made from stainless steel mandrel bent pipes and investment cast flanges. Main power improvements are made by the design and placement of the collectors to even out the exhaust pulses. Large primary runners make it a solid choice for vehicles that will have higher horsepower modifications."-www.stillen.com

[I am Technoman]

My old Greddy header made nice power but the HS makes more.

[C-Kwik]

Greddy headers are rather short. Obviously so that they will not have to touch the Cat and allow it to obtain CARB approval. It does appear to be equal length, but the tuning will take place at too low an RPM to really make it a very effective header. The only benefits you would see is from the better flow. Long tube equal length headers(with the right length) will use the exhaust pulses to draw air out of cylinder creating a scavenging effect. Even Tri-Y headers that make decent power are long from the head to the last Y-pipe.

As far as stillen's comment, it's a marketing statement. While there's nothing technically wrong with what they are saying, it is just misleading since they talk about the larger runners and equal length tubes. It's when you make each of these aspects of a header work together at an RPM where you will benefit most that you'll find a really great header. Unfortunately, not all customers will know that...