Header for a 07' G35 Sedan?

[ADiamond75]

Just like the title says ... does anyone make a header (that's decent) for a 2007/2008 G35 sedan?

[biggie]

http://www.g35parts.com/Infiniti-G35-Se ... s-s/35.htm

Believe there are a few options out there.

[soul_hfk]

that is a little werd that really only stillen makes the headers i to have looked in to them and not saying anything bad about stillen but why havent other

[ADiamond75]

Is stillen realy the only company that makes them for this year?

[biggie]

There are some others, but I'm not sure what fits what:

http://www.enjukuracing.com/nissan-350z ... 2_166.html

[ADiamond75]

There are some others, but I'm not sure what fits what:

http://www.enjukuracing.com/nissan-350z ... 2_166.html

I believe the borla headers for the 350z do not work on the VQ35HR. The Megan's have specifically been stated to not work on the 07-08 g35 coupes by them on their site.

[biggie]

Oh yeah, forgot about the HR differences.

[RED_DET]

I'm fairly sure guys are using oem HR headers on their non HR motors. So I don't know why you couldn't use after-market HR headers on the non HR motors. I will get a definite answer and if that is the case, Borla also makes headers.

[ADiamond75]

I'm fairly sure guys are using oem HR headers on their non HR motors. So I don't know why you couldn't use after-market HR headers on the non HR motors. I will get a definite answer and if that is the case, Borla also makes headers.

Cool, what about G37 headers? Will they work on the VQ35HR?

[gwoods]

Why headers? Have you looked at the clearance between the fender wall and the exhaust maniflod? Its not very much.

The point of headers is to improve exhaust flow for power, sound and/or gas mileage right? On a non-forced induction HR motor I would think test pipes, after market Y pipe and after market mufflers would take away as much back pressure as you would want.

[ADiamond75]

Why headers? Have you looked at the clearance between the fender wall and the exhaust maniflod? Its not very much.

The point of headers is to improve exhaust flow for power, sound and/or gas mileage right? On a non-forced induction HR motor I would think test pipes, after market Y pipe and after market mufflers would take away as much back pressure as you would want.

1) Test pipes generally mean cat delete (unless I'm mistaken) - which I don't want to do
2) Don't know about the Y pipe, but it sounds like more exhaust modifications than just adding headers.
3) Cat Back exhausts that I've heard are a tad to loud (deep tone at idle) for what I'm looking for (stillen).

I guess the real question is why NOT headers.....

[joe603]

Why headers? Have you looked at the clearance between the fender wall and the exhaust maniflod? Its not very much.

The point of headers is to improve exhaust flow for power, sound and/or gas mileage right? On a non-forced induction HR motor I would think test pipes, after market Y pipe and after market mufflers would take away as much back pressure as you would want.

1) Test pipes generally mean cat delete (unless I'm mistaken) - which I don't want to do
2) Don't know about the Y pipe, but it sounds like more exhaust modifications than just adding headers.
3) Cat Back exhausts that I've heard are a tad to loud (deep tone at idle) for what I'm looking for (stillen).

I guess the real question is why NOT headers.....

I did a set of powder-coated (jet-hot) headers on my late model firebird...vowed to never do it again. Nothing but problems from day one.

1. Install was not fun...about 2 full days on the lift. Had to lift the engine to get one side on.
2. They leaked...flange probably was not 100% flat.
3. The bolts would not stay tight...even with thread lock.
4. Because they leaked, the sound was terrible.

That's just me...

I would do a set of high-flow cats and a good aftermarket CAT-back system. Greddy or HKS are the best. I didn't care for Stillen.

[soul_hfk]

joe who would u say makes the best high-flow cats ?

[ADiamond75]

I did a set of powder-coated (jet-hot) headers on my late model firebird...vowed to never do it again. Nothing but problems from day one.

1. Install was not fun...about 2 full days on the lift. Had to lift the engine to get one side on.
2. They leaked...flange probably was not 100% flat.
3. The bolts would not stay tight...even with thread lock.
4. Because they leaked, the sound was terrible.

That's just me...

I would do a set of high-flow cats and a good aftermarket CAT-back system. Greddy or HKS are the best. I didn't care for Stillen.

Jesus, those sound like crappy headers. I've always had good luck with headers as a good starter mod. Miata, 240sx, 85 GMC ... always improved sound without getting a drone or rasp while giving pretty good power for a small mod.

I guess the real question is where is more restriction to the exhaust coming from .. the manifold or the y-pipe. If its the y-pipe, I can see where it may be an advantage to replacing it (besides the fact that its easier to get to).

[joe603]

Berk or Random Technology are pretty good.

[gwoods]

I had PaceSetter Long Tube Headers on my 04 Hemi Ram and the install was easy I had to grind the transmission case down slightly to keep them from hitting but it was awesome. On the G sedan there is very little room between the engine and the fender. I suppose the easy thing would be to remove the fender or lower the engine out of the car? I doubt you could install headers without doing one of these two things.

You could get similar performance and sound with a good Y-pipe, highflow cats or test pipes and a different muffler set up.

Pop your hood and try to touch the exhaust manifold on the drivers side, your hands may be smaller then mine I can't do it?

Putting on headers would be a lot of work for not much gain in my opinion. I just did a TOP Speed Pro1 Y pipe and love it.

[ADiamond75]

Yeah .. I guess the next question is ...

Is there really any difference between y-pipes when all they seem to do is lower restriction by using a larger diameter? I found one for $51 shipped thats 3" outlet.

[RED_DET]

It seems there are quite a few different configurations on the Y pipes depending on vehicle and year. I have the g37 HR y pipe and it definitely was an improvement over the stock with smaller diameter piping but less restrictive bends. The 350z HR Y pipe is designed like the g37 y pipe but has larger diameter piping, 2" vs 1.7/8" on the g37 y pipe. 2.5" collector on both pipes. If I'm not mistaken, your y pipe should be just the like the g37. I don't know if you are going to get much more improvement. The high flow cats would be your best bang with a catback exhaust. Invidia makes a good set up high flows as well.