thanks for the response. I would like some info from sasha/SG to confirm but pretty much unless u have a race car these headers are not for u?

 

I wouldn't say race car at all, like anything else, it takes the right combo of mods

 

well what would u call it then? Whats the right mods?

 

I'm sure any car can swap these on and see gains. My guess, in order to use this to its full potential and get your money's worth, you'll be needing more then just your average bolt ons. If you don't plan on touching the inside of your motor to the slightest extent, (i.e. at least cams), maybe this isn't for you.

 

i kinda understand that. But if these headers "need" Cams head work etc to get "full" potential and for a 2000$+ price tag(without install or tune) it needs to b disclosed by SG Motorsports. paying right at 3K for 20hp seems completely ignorant to me. btw 3k is adding CHEAP install with a cheap tune.

 

Upgrades work hand in hand. How do you expect to get full potential out of 1 part if the rest of the parts you have are just "blah". Its like fully building a block with stock heads, how does it make sense? Sure you just spent 5+grand, but without supporting mods you won't see any gains. What could be 20hp on a fairly stock motor could be much more with a built one. Some people pay 2k+ for an Amuse exhaust that probably gives less than 10whp lol. Even with that said, these headers probably still give more power on any build motor then we have available.

 

Cams minimum, maybe headwork. Proper exhaust behind it. Obviously a tune to take advantage of it.

 

You need to just go F/I. Na is not cost effective at all if your worry about cost/hp.

 

https://my350z.com/forum/na-builds/3...-roadster.html

 

Wow how did I miss this thread.

Thanks for posting it and being so supportive guys! One set have pre-sold already, and to be honest with all of the interest I've gotten in the past year regarding these headers I'm amazed the second set hasn't sold. I really hope this industry doesn't break my heart (although sadly, I feel it may).

Regarding header design and power gains:

- The right parts cost money, most aftermarket headers don't use a true merge collector, and if they do, it's a universal one produced for many applications to reduce costs

- The stock exhaust manifolds are short to accommodate a cat early on in the exhaust flow, for this reason the primaries aren't the length they need to be to make power.

- Headers work best with a free flowing engine (intake, cams, exhaust), but it doesn't need to be over complicated either. Our headers are designed for a mild competition cam (JWT C8, Tomei Procam) and free flowing exhaust. But because the VQ has variable cam timing (sometimes on both banks), huge power gains can be found from a properly designed exhaust system.

To remind everyone of the results we've seen:

28whp with absolutely no tuning on a 2006 350z roadster (revup) with ONLY *ONLY* intake and y-pipe back exhaust.

On a non-revup G35 with intake and exhaust, the gains we saw were smaller but the car was never tuned. I don't want to speculate, but I am confident if we had more time to tune the car we would have found more power. I believe we saw something in the area of 12-15whp, but I need to confirm that.

As soon as you add aggressive cams, the engine comes alive. The stock heads are already very good (our racecar has stock heads and stock lower intake plenum flowing 330whp).

We also saw gains with our headers from 3000rpm and up. This is because we're able to use a primary tube length that works! Unfortunately, emissions is the sacrifice. The reason we suggest these headers for off-road use only is because of the requirement to remove the cats.

You don't need a built engine for these headers to make big power. But the stock exhaust manifolds will become more and more of a restriction the higher the power gets, and more of a gain will be found by switching to our headers!

 

Exactly what I posted previously (IMHO)

 

SG did say it and has said it for a longtime. Revups will love them. Nonrevups will need alot more to get the same gains. Just the way of the world.

There is no singular part that will make even 20whp on a nonrevup motor. NA is all about cumulative, carefully selected mods and the accompanying tuning.

 

i remember reading on your thread about the headers on your race car that they are bigger than the ones you are putting on production.... Also, Got to remember that Headers(gains)+Cat Delete(gains)= Bigger over all number output.

 

im not worried about cost/hp. But if its not worth it for a DE then ok im not interested. I was talking to bobby at CIN about my car and i mentioned these headers. After reading he also said these are NOT for me. Im going FI but i didnt know if i wanted ST or SC with these headers(if they would work).

comparing a 2k exhaust for nuthuggers and these headers are apples to oranges. Iv spent so much money on exhaust mods i should b slapped. however it seems unless u want to go inside ur motor u will not get FULL potential out of these headers which imo is worthless. Ill just go the route i intended BP ST and b done with it.

Also thx sasha for clearing things up. I wanted to hear it from the horses mouth. Rev ups will like them more then DEs. DEs will like them if u add aggressive cams and a aggressive free flowing exhaust.

 

Looks like someone bought the last pair.

I wonder who the lucky buyer is?

 

NO... ^^ Did ya do it?

 

I dont see the headers on there site, where are they?

 

Last pair was sold to me. It's off the site until next batch of 10.

 

congrats man!

they are gonna be so sweet, I'm jealous.

 

I'm pretty sure they should bolt up.