Good Luck Ron.

 

Thx. Wish everything was better explained. They'd be installed and running already lol. Ah well.

 

512z has the same stepped w/o reducer on his HR.

PPE 370z headers look similar to SG design with the step closer to the heads.

Look at his dyno sheet you should be good since you have a HR.

 

I went back and this was what was finalize for me I believe:

From the looks of my headers looks like just that stepped no reducer?

Then many asked if the reducer was extra which it isn't, so I think I asked for it. At this point don't care as they are already on the car.

 

Yep you have the same. Wish I would have seen that before.

 

Dammit! Mine has a reducer, and it's an HR. Not installed yet...

 

You HR guys should be good look at 512z dyno he has the same headers on his HR.

Doshuru you should be good also my dyno between stepped and non stepped was not much difference up top.

The non stepped with reducer gave me the biggest gains on the lowend 15-20 hp/tq.

Ojiggy if you want I can take better pics of my reducers to help give your shop a idea.

I just unbolt my ypipe slide them in and bolt back up. The dyno on the previous page is what they did for me on the stepped headers w/o reducer.

I think the closer the reducer is to the collector the bigger the impact.

Since you guys can tune both intake and exhaust cam timing the reducer may not be needed for you guys.

 

denchan -- I have an 07 HR.

 

Maybe somebody got a stepped set by mistake that can trade you

 

Denchan:

I'm actually talking about the reducer, not the step -- based on what jiggy said earlier:

Here are mine, for reference:

 

^- photo is too far away for me to be certain, but it looks like you have a nonstepped set.

 

I also think that's a non-stepped set with reducer, just like mine.

 

Those are non stepped w/reducer Dos. The step is where the piping goes straight. Look at Kingsbaby pics.

 

Yeah, I know what they are, and they are what I ordered. I just thought that it had been settled that non-stepped with reducer was best. I suppose I knew that I had an HR so my results might be different, so I can't complain, really. Being an early adopter always has its risks! Just sucks to now hear PPE saying that the HR works best with the exact opposite of what I got....stepped without reducer, vs non-stepped with.

 

Never been tested non stepped on a HR only stepped. Who knows you may get better response SE with the non stepped w/ reducer on a HR.

If it makes you feel better FI longtubes for the 370z and G37 are not stepped and have similar gains

 

I may have to get a set of these reducers made to try out

 

Im going to do that just for nerd testing purposes. Maybe have denchan send me some lol.

Im going to search for injectors also. Ive seen 2 hr's that needed injectors after this mod. Sometimes we get lucky and GTR injectors pop up for cheap.

 

So both stock headers are out. Pass side is bolted in. Between the steering rod and the tranny it feels like I can't physically fit the headers between them. Any tips?

Edit: I got it, man what a nightmare. The stock studs are definetly the enemy on this.

 

I posted a few tips

 

Step in, Step out, reducer , no reducer . Been trying to catch up but getting bored of this readin every single page LOL

Super happy with mine no complains of the gain and the sound. Love the sound of these headers.