I finally got my Nismo Header installed today along with changing my spark plugs to Denso Iridium, put new K & N Air filter, and did my first oil change at 3,000 mi with Amsoil 0-30w.

In general, the car seems to be smoother and I feel more pull, especially above 4k RPM.

Before, when I use to push my car, it seemed like something was holding the car back. My car was not pulling espcially when I go above 4K RPM but now, car seems to be pulling much better. Especially above 4k RPM. I think it has to do with combination of K & N Air Filter & Nismo Headers. I did notice a better pull on my previous car with K & N Air Filter also along with Stillen Exhaust.
Also the car seems to respond better in acceleration through out the band.

As for being smoother, I think oil change & changing the spark plugs to Denso Iridium helped. I did use Denso Iridium before on my Acura-TL Type S and it did make the car smoother. Especially at idle.

 

The headers are letting you pull more in the higher rpms because there is less restriction. The K & N filter is doing little to nothing.

 

Next should be high flow cat's and a U/D pulley and you'll be all set!!!

 

Where did you get the header installed at? How much and how long did it take?
I'd love to have a header but the DYI install keeps the money in my wallet (and skin on my knuckles).

 

I think it took about 4-4.5 hours but I had other things done too, like changing spark plugs, oil change and he also took some time to do make sure that there is no leaks on my headers & the exhaust.

I also noticed that change the spark plugs is a B!tch. You have to take lots of little things apart.

 

We'll install your headers for $400. while you wait, if you don't want to do it... 5 hours labor is what service is charging my customers these days...

 

After few day of have Nismo Headers installed, here is my impression.

I can honestly say that I notice the difference in power. The car is very responsive when accelerating. Even at lower RPM.

When I got my Stillen Exhaust installed, I really did not notice that much of difference other than car being louder and when I installed K & N Air Filter, I did notice little more power but with Nismo Header, I really did notice more power.

I also did notice that my car is little louder too with Nismo Headers but not by much.

Just an update.

 

how many bottle of amsoil oils???

 

I had 5 quarts put in.

 

Those Amsoil quarts must be short or you left 3/4 of a bottle at the shop. I've only had my car long enough for 3 oil changes but 4 quarts of Mobil 1/Royal Purple with a filter change leaves the dipstick dead center between H and L. When I'm being really **** I'll open that 5th quart and put about 1/5 more in.