I want to have a 3 inch exhaust put on my 75 280z, and i was wondering what headers everyone else uses for more hp. I have been searching the internet, and I can not find any headers for my l28 N/A motor. What headers does everyone else use with there 3 inch exhaust setup, will it be ok if i use the stock header?

A 3" exhaust will net you nothing on an N/A car. Headers will net you nothing on a stock L28 N/A motor.

I concur. I am working on getting a better breathing head and a more aggressive cam before I would think about installing a header.

A 3" exhaust will net you nothing on an N/A car.

Well, every SCCA ITS 2.4L car I've ever seen runs a 3" exhaust. All the Vintage racing 240Zs I've seen run a 3" exhaust (2.4L, 2.8L). My old NA 3L ran a 3" exhaust... I can keep going...

Come on, John. They're talking about a 3" exhaust on his (zmaster's) car. Basically a stock 75 with a few issues. Coupled with a Fitch Fuel catalyst, a fuel pump reading of 0.03 volts, and whatever other nonsense he's posted about that car the last thing he needs is encouragement here.:eek:

My issue was with the blanket statement posted above, not what's appropriate for a specific car. 99% of the 240Zs driven on the street do just fine with the factory exhaust. A good valve adjustment will usually give a bigger horsepower gain then upgrading to a 2.5" exhaust.

I know. My issue is with with the naivety (and gullability) of the thread starter. I really should apologize for even posting that response.

i have fixed the problem with my car and will be a daily driver finally in less than a week, and i asked about the fuel catalyst to see what everyone thinks of themi always see them advertised on tv on the weekends on spike tv when extreme 4x4, trucks, muscle car, and all of the other car shows are on, plus trucks tested one, on their dyno first without on, and then with one, and they say it increased horsepower, and milage. just my 2 cents

My issue was with the blanket statement posted above, not what's appropriate for a specific car. 99% of the 240Zs driven on the street do just fine with the factory exhaust. A good valve adjustment will usually give a bigger horsepower gain then upgrading to a 2.5" exhaust.

I should have qualified my statement by saying stock N/A L-series.