To all of my friends on "the370z.com".
We have done it, a long tube header for the 370Z. Here are the facts:
-NO CHECK ENGINE LIGHT!!!
-Our long tube header bolts up in OEM location to the stock cat back.
-It eliminates your stock exhaust manifold and stock catalytic converter.
-The headers combined weigh 21 lbs. (17 lbs. lighter than the stock combo).
-Constructed from T-304 stainless steel with a limited lifetime warranty from us (Fast Intentions Inc.) for all welds and craftsmanship!
-There is nothing on the market remotely close to these and believe me when I tell you, it is noticeable power throughout the RPM range. I feel a big difference all around.
-These headers are considered "FOR OFF ROAD USE ONLY".
We have been working on these for some time now.
We have done extensive dyno testing with 3 different variations. In the pictures below, you will see a collector that merges down to 2.0" and then gradually grows back up to 2.5". That was test #1 and we found that it made good gains in the low end and mid range but no power up top. Essentially the header was being chocked off. Test #2 was a collector that merged to 2.25" and grew back up to 2.5". It retained the low end and mid range but the top end was still not where we knew it should be. So, we went back with test #3 which is a collector that merges to 2.5" and mates right up to our cat back without any disruption in tubing size. As you can see, we lost absolutely no low end or mid range picking up 11-12 RWH in places through the curve and a good amount in the top end. Many other manufacturers claim big numbers but from what I have seen, only a select few back it up. We are dedicated to giving you the facts. Version #3 is what the production header will be.
Update- 2/18/2020
Update- 12/29/09
Video: F.I. Long Tube Headers W/F.I. TDX Cat Back 12" Resonators
Update- 4/2/2010
The time has come my friends. Production has begun and here are the beauties...
When you order this is what you will get:
Comparison: Stock vs. FI long tube header (Driver side)
Comparison: Stock vs. FI long tube header (Passenger side)
To start off these dyno charts I wanted to show a chart in (STD) form. It is not the way we came up through the ranks but it seems like it is the standard norm, on this forum. No pun intended, ha ha! Now it has dawned on me, the reason everyone posts charts in (STD) is because they show the highest gains. With all of that being said, we figured we would play ball...
Now, to keep everything rolling smooth and to stay in line with the way we do things, here is the dyno chart in (SAE) form...
I always hear Tony, NO ONE shows A/F numbers. Without further delay, A/F numbers it is...
Now, this is a fun one. Obviously take this next chart as you will...
This is a preliminary list. Once you are on it, you are reserved that number in the production run. It will be just like our cat back exhaust systems, we build and ship them on a first come first serve basis. If you would like to be on this list, PM me here or email me at my email listed below in my sig. When you send me the PM or email, please include your first and last name as well as the fastest phone number to reach you at. I will call you directly will all of the details. This list is for SERIOUS INTEREST BUYERS ONLY! If you are on the fence no biggie, I understand that most people want more information or need to get money together or just think these look cool and these may never be for them. If you are iffy than please hold off on the PM until you are ready. We are very busy year round and always undermanned. Here is what we are looking for: A minimum of 10 buyers, at that point we feel there is enough serious people to put them into production. The cost of the production headers will be: $995 + an additional cost for shipping that we will factor in once we have a box made. I cannot see the shipping cost being more than $40-$60 to any of the 48 lower US states. Anyone who has purchased a Fast Intentions TDX cat back or is purchasing one with the headers will receive and additional $100.00 off of the price of the headers. That will bring your cost for the headers to: $895.00!!! We are asking for a $400.00 down NON REFUNDABLE deposit. We WILL NOT run anyones deposit until we have a minimum of 10 people. I will just keep your C/C info. in a secure place on file. I am confident that we will get to 10 quickly but that is up to all of you. We are on target to receive the dyes sometime in mid to late February 2010. Once we have them, we will start the production process and orders will start to ship in the order they were placed on the list. Once your headers are done, your card will be run for the remaining balance and your order will ship.
Fast Intentions Long Tube header Group Buy:
1)HNGonzalez
2)Semtex
3)Daishi
4)Mr. Anonymous
5)Kolya
6)The Dreamer
7)LeonZ5
8)Earwicker7
9)Zello370
10)Matrix_Square
11)Daindazz
12)Cotizi
13)Jason S. (Non Forum Member)
14)NYBladeZ
15)chuckd05
16)res0zsfa
17)Danny3.7
18)Tardcore
19)Booger
20)PG6speed
21)cubarican84
22)Shultea1
23)VH370ZNISMO
24)Vipor
25)E.Johnson
UPDATE- 1/27/10 (MUST READ)
Well, we hit 10 sooner then I expected. It is official, we will put them into production.
So since this is actually a group buy, I have decided to cap this specific price of $995/$895 on February 15th 2010. These prices are very aggressive and cannot stay that way. I originally capped the group buy at 20 however, I have alot of pending orders so I do not want to leave them out in the cold. Now I set a cutoff date opposed to a number limit. So anyone and everyone who wants them at this price has until the date listed above.
Once we hit February 15th, 2010 the group buy will be CLOSED! and headers will be listed at the following prices:
Purchase of just the headers: $1,250
Purchase of our cat back exhaust and our headers: $1,150 (Limited time package offer)!
If you already own our exhaust and want to purchase our headers: $1,150 (Limited time package offer)!
Again, there is no number limit on this group buy, just a time limit. If anyone has any questions, or would like to place an order please do not hesitate to contact me directly...
UPDATE 6/17/2010
A must read for all long tube header owners thinking of adding the GTM supercharger kit:
I wanted to chime in real bad on the GTM supercharger thread. But I have bit my tongue and out of respect for Sam and GTM I will do this in my own thread.
There is alot of talk going around that my headers
"flow too well" for the HR motor due to the VVEL with the long duration and overlap.
Shumby now is a proud owner of the GTM supercharger kit for his G37 and has removed our headers due to a lack of boost and power with them. I cannot sit here for any longer and let my headers take the abuse for something else that is causing the issue. I feel that it is not a tuning issue. I feel that it is a hardware issue, i.e. the supercharger itself or the kit.
Here is the deal, headers relieve back pressure. By relieving back pressure you will have a PSI drop off (boost). The goal should be to make as a much torque and power on as little boost as possible. This is called "efficiency".
I have never in my life ever, ever, ever, installed a supercharger on a car along with headers and lost power. The only way it is possible is if the supercharger kit is inefficient. This leads me into the next phase of the topic.
I have spoke to Shumby myself over the phone and here is the information I was given:
Tony, we supercharged the car and with the headers installed along with your exhaust it only made 4 psi. Then we put a smaller pulley on it and only picked up 15 horsepower and very little boost. I was never given the boost number I might add and I don't think Shumby was either. Then I was told the headers were removed and stock manifolds along with stock cats were installed. I was told at this point the car made 6-1/2 psi. So then they took the stock cats back off and put the GTM straight test pipes on the car. Same result, the psi dropped back to a very close place to the headers. No doubt, the stock cats are much more restrictive than the long tube headers or even straight test pipes. So now the stock cats were put back on the car and oh but wait, a boost leak was found. But I was told it was minimal. Either way it is force induction and a leak is detrimental to boost and power! So naturally I asked, after the leak was rectified did you put the headers back on the car a dyno it again. The answer was no we did not!
I want to see an 8 psi stock cat, stock manifold number vs. FI long tube header 8 psi number. I would bet the farm that apples compared to apples we would make higher number across the board. If you cannot get the boost back up with the long tube headers than the supercharger itself cannot move enough volume AKA (CFM) or the supercharger kit itself is holding it back. Size of intercooler, tubing size, the way tubing is routed. A good way to see if the intercooler is efficient is to take a psi reading before it as well as after it. If the psi drop off is dramatic after it than the intercooler is not efficient. If the intercooler is efficient than it is most likely the head unit itself. It physically is just too small and cannot support enough volume to feed to motor. Bottom line you then rely on the stock cats to build the boost.
Here is where the problem lyes with that. Boost is heat and the stock cats were never intended to have #1 to have that much velocity forced through them, (especially for extended periods of time). #2 being a ceramic cat they will never hold up to that kind of abuse. Worst case scenario you send the EGT's (exhaust gas temperature) through the roof before the cat and melt it shut. I think it is a poor selling point to tell people, here is my supercharger kit please buy it. Oh by the way you need to keep stock manifolds and stock cats on the car the make the boost and in return make numbers!
If the car needed that much back pressure than explain why naturally aspirated with no air being crammed into the motor how we picked up substantial amounts of torque and also power accross the board! So until I see see an independent dyno done correctly comparing apples to apples than I am not buying the information that is being sold.
Thank you for taking the time to read this. The phone lines are open...
Tony