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Stillen Headers on 370z

Here is a few shots of installing headers onto my 370z that I got from Stillen. The Install took place at my shop Relentless Rpm. I will post up some

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Old 03-06-2009, 11:15 PM   #1 (permalink)
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Here is a few shots of installing headers onto my 370z that I got from Stillen. The Install took place at my shop Relentless Rpm. I will post up some more pictures along with a baseline dyno and a post dyno. My base line dyno pulls vary between 279.6hp and 283.6 peak hp. Next week I will do some after runs with just the headers. I am also working on our own catch can and will post up some install photos of that.

One Place i see a lot of gains to be made is in the y-pipe area as it gets very narrow after the cat.

Two words of caution, Nissan made one cat nut super tight on each side and we ended up breaking a stud on each side that we need to use the heat wrench on, and also it appears nissan cross threaded the a/f sensors on my car. Luckily I had a die to retread the a/f sensor to install into the stillen headers.

If you guys want more pics of the installed piece i can through it back on the lift come monday, I am going to enjoy this weekend off.








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Old 03-06-2009, 11:29 PM   #2 (permalink)
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have you driven it since the install?
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Old 03-06-2009, 11:33 PM   #3 (permalink)
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Originally Posted by kgreen View Post
have you driven it since the install?
Yes, my butt dyno says more, but I had to finish some customer work today and installed a lsd into a co workers 350z so i was limited on time to dyno it today.
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Old 03-07-2009, 12:04 AM   #4 (permalink)
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Nice! Those bolts are rediculous. I broke a socket and two extensions on those bastards when I installed my HFCs.
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Old 03-07-2009, 01:23 AM   #5 (permalink)
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Looking Good, Dyno!?
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Old 03-07-2009, 01:48 AM   #6 (permalink)
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More pictures please!

Did you happen to snap shots of the merge collectors before you put them on?
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Old 03-07-2009, 07:04 PM   #7 (permalink)
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More pictures please!

Did you happen to snap shots of the merge collectors before you put them on?
you know what i did not but they are very clean.

These are g37 headers but the OEM part numbers match 370z/g37.

I should have post dyno numbers next week. Josh and Kyle at Stillen were a big help with this.
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Old 03-07-2009, 07:05 PM   #8 (permalink)
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Nice! Those bolts are rediculous. I broke a socket and two extensions on those bastards when I installed my HFCs.
Matco makes a 36inch ext with a 1/2 female and 3/8 male end that you can use with a breaker bar and a deep 14mm swivel. We had to use the torch to get the studs out.
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Old 03-07-2009, 07:29 PM   #9 (permalink)
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so they fit in there with no problems??

how long did the install as in how long did it take to get the headers in.

did you guys try chemicals to get rid of the orange crap on all the nuts and bolts?

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Old 03-08-2009, 01:23 AM   #10 (permalink)
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Looks good
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Old 03-08-2009, 11:43 AM   #11 (permalink)
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Wow! I'm definitely keeping an eye on this thread now that I've got the Stillen Cat-back and Berk HFCs in already. Headers would be a good next step! Great job, and thanks for the pics!
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Old 03-08-2009, 01:12 PM   #12 (permalink)
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I'm also looking at this with lots of interest. I think Im going to be sending a lot of cash Stillen's way when everything is out.
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Old 03-08-2009, 02:48 PM   #13 (permalink)
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I'm also looking at this with lots of interest. I think Im going to be sending a lot of cash Stillen's way when everything is out.
Same hahaha
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Old 03-08-2009, 07:57 PM   #14 (permalink)
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Cant wait what power gains you get.
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Old 03-09-2009, 08:51 PM   #15 (permalink)
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i made a ton more up high but lost mid range which i feel can be gained with more exhaust work. Dyno charts will be up tomorrow i forgot my jump drive at home today.
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