ART pipes will be a tad quieter than HFC usually

And will these headers even change the sound much?

the headers did change the tone quite a bit, has a mean low growl to it, honestly the art pipes took that away, I am highly considering tracking down some DE resonated test pipes...nothing against the ART pipes, just changed the sound more than I though they would, best bet for those looking to dump the cats and not add a lot of sound volume.

I'm thinking about buying some fast intentions resonated TP and throwing these headers on. Hopefully that sounds wonderful :happydance:

I'm excited for the dyno/tune results. I hope they come out w/ HR flanges soon.

tried installing these headers today... shop had to remove coolant line to get to the driver side header which took additional labor and coolant.
AND upper o2 sensor seized in my oem header. Have to wait till tuesday for o2 sensor to arrive.

shitty day for me:shakes head:

i would be running z1 header, fast intention resonated test pipe, motordyne y pipe with resonated pipe option (possibly HFC option if too loud) and tanabe y pipe back

Shop shouldve did what I did. I didn't have to remove my coolant line. I loosened the driver side motor mount, jacked it up slightly and my life became 50 thousand times easier for the driver side header!! Should've got a set price cause your labor will add up considerably if you're letting them quote you on the fly....

Well just got the call from my tuner, the car feels great and very responsive but the results unfortunately for my particular Z were the same. I do not have a graph yet so I need to travel up there to SA and start making some serious decisions about going FI or just a different route.
Numbers the Same as in 309whp 269wtq. The only difference I see in the charts the climate conditions. When I hit 322whp 267wtq the temp. was at 72 degrees Fahrenheit and the previous dyno run and today's the temperature is and was at over 90 degrees fahrenheit.

Same dyno too? Temps can easily account for the power difference. Torque is showing up though. 269lbft a lot for 309whp. On VHR's, we don't see 270lbft unless someone is over 330whp. Is it a dynojet?

Yes it's on a dynojet.

Well, I'm back in MD now and my z1 header install and de test pipes will occur on 8/19 and run 2 or 3 days inclulding the retune at AAM. Im surprised that there are still no results in this thread yet there will be next week :)

Hoping to see a gain from 317whp to something over 330whp. Original tune and dyno done at aam so should be perfect for comparison of gains from the mods.


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Well all tuned up...wasn't the best peak numbers...but they found me some good gains...322 HP 270 tq...based at 306.

Nice results joepro do you have a pic if the dyno sheet? How's does it feel on the street ?

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I do... Driving home now I'll up a graph when I her home... Feels fantastic!

Sweet. Peak is still a damn good gain for you. Looking forward to the remaining info.

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I knew there was an issue at 5500... I've been aware of it as have my friends from hearing me complain.... At least I wasn't crazy.

Just want to make sure this was the headers and a retune? Anything else?

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I do not have a pre header tune...I was Hoping for 330, it was my goal, however with talking with Vince he said the only ones that dyno higher for them are the ones with long tubes, I did not think there would be that much of a difference between these and long tubes...My torque I though was quite good. I have takeda long tube intakes, the z1 headers, motordyne art pipes and fast intentions exhaust. and M370 manifold. I looked through rt's tuning videos, most of the 370z first pull was average of 300, so I based a tad higher, and most they said were high teens in the 300s...I might also hit a local dyno(they do not tune) and see if I get similar results, every dyno is different, but I can tell you I felt butt dyno results with install of the headers, so regardless of the numbers my feel is they are worth it, and I plan on supercharging in the next year, and the stock header design is restrictive.

But did you have art pipes before as well?

That manifold's costing you peak power and giving you more area under the curve.

It's also August. $5 says you'll hit your power goal if you go back in the winter.

Under the curve is where it counts to me...the art pipes went on a week after the headers to combat the test pipe rasp.

I'm just curious as if you had TPs before as well, or if the mod list was headers, TPs and a tune, or just headers, DE TPs and tune

Yea. Take off the manifold and you will get around +10 peak (from my experience). 330WHP is where you would be if you did.

IIRC, Mike does not run the M370, and achieved 342, albeit on a different dyno.

Absolutely. Ill happily give up 5-10 up top for the increase in mid range power. You spend a lot more time in that part of the power band.

well in the spirit of pure speculation on the headers in this thread, lets do a hypothetical... If rt average tune on a bolt on car with no m370 and no headers is lets say 318(just averaging what they posted on their dyno vids) and I add 10 hp to mine, I would have been at lets say 332, so the headers would have gained on average 14 hp....I would say that is a safe estimate....and my gains after the dip on my graph are quite good IMO.

Your mods r the same as mine basically. I think just different vendors. Im hoping switching the hfc for test pipes then adding the headers will be a significant difference in the butt dyno and maybe a tenth or two in the quarter would be dreamy (yeah I said dreamy). Extra torque for the track days. I get that I dont care what the dyno reads but 330+ would be awesome.

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Got the Stillen CAI, Z1 headers, Z1 test pipes, Litespeed exhaust and uprev & tune from CIN Motorsports. Pushed 318 on a hot 90° plus day - mustang dyno. This set up though sounds almost like a exotic street car instead of a Z. CIN did a great job on the car. Getting 4.08 rear installed soon. Bring down that 0-60.

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That combo sounds amazing! Same combo I'm running....was running. Voted best sounding car at the SCCA Solo events lol.

any videos?

Here is the video. Sorry for the quality my daughter is holding my camera phone which doesn't do this exhaust no justice.

That's awesome! See if I can't get some up soon for ya ;-)

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I did briefly run the M370 before the headers, but before and after dyno tests showed it did absolutely nothing on my car, so I sold it.

Dropping car off tommorow morning at AAM for the header, test pipe install followed by the retune. Only 1 confirmed dyno result so far. I think I get it back wednesday so some more results at that point.

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I just finish putting everything in! It sounds amazing. Not too loud for me. Drones a little going up the hill. My current setup is actually quieter than my previous set up.

Previous set up is Tanabe y pipe and exhaust and berk hfc

Set up now is Tanabe exhaust with motordyne resonated test pipe option y pipe and fast intention resonated test pipe and of course z1 header.

The car will be tuned this coming saturaday. I will report back after the tune!

Ugh I cant stand not having my car. The wait is killing me. Should be picking up tommorow sometime. I think its almost put back together at this point and its hard not to call or email and be a pain in the butt.

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Curious, what did you have to give for the install?

You can PM if you'd like, just trying to get a handle on what shops are charging for headers. ty!

6 hours labor for the header install, which seems reasonable. Actually under what I was expecting. I was expecting 8 hour labor so iwas pretty happy.

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Couple problems so far all o2 sensor related. I had bottomed it out a couple times in houston and basically beat up one of the secondary o2 sensors so that had to be replaced. Threads on one of the primary o2 sensors so bad needed to replace that one also. These things I hope r awesome because my price just 2ent up a bit in order to replace those o2 sensors.

Good news is it should be on the dyno in the AM and hopefully ready for me to take home sometime around lunchtime tommorow.

Ugh, good thing I've gotten a new job already...

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Nice! Can't wait to see results. I'm really hoping the HR flanges come out sooner than later.

Looks like I should grab some sensors from eBay for backup.