76Fairlady Posted June 19, 2014 Share Posted June 19, 2014 I've searched and I apologize if I haven't seen it, but here goes... What is the best header for a square port N42 head? How is the Clifford? And any experience or dyno numbers from the one off Ebay from Top End Performance? Thanks in advance! Quote Link to comment Share on other sites More sharing options...
johnc Posted June 19, 2014 Share Posted June 19, 2014 There is no best here on Hybridz. Rule 4. What do you intend to do with the car? What horsepower goals? What rpm range for the power? What head work has been done? What cam? What induction? See what I'm getting at? Quote Link to comment Share on other sites More sharing options...
ttodhunter Posted June 19, 2014 Share Posted June 19, 2014 They're all going to be pretty close and on a stock ECM'd 280z, don't expect too much. My advice is, whichever one you get, weld in a bung for an O2 sensor. Quote Link to comment Share on other sites More sharing options...
76Fairlady Posted June 19, 2014 Author Share Posted June 19, 2014 Just a fun street car. Extensive head work. Nasty cam. I want to know who has the biggest runners and best collectors as well as equal lengths. Quote Link to comment Share on other sites More sharing options...
josh817 Posted June 19, 2014 Share Posted June 19, 2014 Stahl and Nissan Motorsports make headers with primaries that are 1 3/4" diameter. The collectors I can't comment on. In the exhaust section of this website is a thread talking about Stahl not making the headers anymore though you can buy the tubes and weld them I think.Or you can go with a header from Japan, there are a variety that have large diameter primaries, and the majority of them are very expensive. Anywhere from $800-2500 US.The biggest is not always the bestest Quote Link to comment Share on other sites More sharing options...
rturbo 930 Posted June 20, 2014 Share Posted June 20, 2014 (edited) Edit: I can't read. And no delete button? Come on. Edited June 20, 2014 by rturbo 930 Quote Link to comment Share on other sites More sharing options...
310z Posted June 20, 2014 Share Posted June 20, 2014 Pace setter makes two, a smaller diameter and a larger diameter 6-2 header. However the collector is all wrong and would hang about 5 in. below the bottom of the car/on the ground. My collector was customized over approximately 20 in. bringing the two into one, like a tri-y set up to a 2.5 in pipe. I have no complaints about flow on my 3.1 L. Quote Link to comment Share on other sites More sharing options...
76Fairlady Posted June 20, 2014 Author Share Posted June 20, 2014 I've been looking everywhere for a Nissan Competition or Motorsports header for the past few months. Those are pretty darn hard to find these days. My car is Right hand drive which means NO STEERING SHAFT to get in the way! Yippy!!! Lol Quote Link to comment Share on other sites More sharing options...
josh817 Posted June 20, 2014 Share Posted June 20, 2014 I've been looking everywhere for a Nissan Competition or Motorsports header for the past few months. Those are pretty darn hard to find these days. My car is Right hand drive which means NO STEERING SHAFT to get in the way! Yippy!!! Lol In that case. 45 aqd 48 are the primary diameters in millimeters. Have fun Quote Link to comment Share on other sites More sharing options...
JohnH Posted June 26, 2014 Share Posted June 26, 2014 (edited) Stahl and Nissan Motorsports make headers with primaries that are 1 3/4" diameter. The collectors I can't comment on. In the exhaust section of this website is a thread talking about Stahl not making the headers anymore though you can buy the tubes and weld them I think. Or you can go with a header from Japan, there are a variety that have large diameter primaries, and the majority of them are very expensive. Anywhere from $800-2500 US. The biggest is not always the bestest Stahl Headers is going out of business. They no longer make an assembled header. There may have a header kit left in their inventory sell off. Nissan Motorsports no longer makes a race header (among most other parts) for the L-series engine. For a decent size race header you will have to look to the Japanese aftermarket $1000 - $2500 this side of the Pacific (Kameari, Fujitsubo, Trust) or have one custom fabricated. Edited June 26, 2014 by JohnH Quote Link to comment Share on other sites More sharing options...
theczechone Posted June 26, 2014 Share Posted June 26, 2014 (edited) Trust header, about 35mm primary (OD) and dual 48mm outlets. Should be careful with the Japanese headers, some will not clear steering shaft on LHD cars. This one does thou Edited June 26, 2014 by theczechone Quote Link to comment Share on other sites More sharing options...
1vicissitude Posted July 25, 2014 Share Posted July 25, 2014 That trust header has surprisingly small primaries. Not sure I'd go that route on anything but a nearly stock motor. Quote Link to comment Share on other sites More sharing options...
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