Headers for FI HFC

nandosman · 09-12-2017, 10:14 AM

I searched through the forum but didn't find a proper answer.

I have (or rather, will soon have) FI CBE and FI HFC. I'm wondering two things:

1- Which header would fit them, and
2- Will it be worth the money

I had my eyes on the Z1 400HP package (without their test pipes, oc):

https://www.z1motorsports.com/z1-pro...ge-p-7223.html

but from some of the posts I read here, it seems fitment will be an issue unless it's with their HFC/Test Pipes.

What are your thoughts on this?

JLarson · 09-12-2017, 11:12 AM

Essentially the issue you'll run into is your current HFCs have a different flange from the flange on the headers, so they won't fit with the Z1 headers, which were designed for the 350z. You'll either need to buy a header designed for the 370z, or buy a cat-section that was designed for the 350z and pair it with the momentum/z1 headers.

nandosman · 09-12-2017, 12:05 PM

So are there any other headers, worth pruchasing, that will fit my FI HFC? What about the stillen ones?

JLarson · 09-12-2017, 12:53 PM

Stillen headers have shown no gains or very low gains - lot of effort for minimal results. Personally, after a lot of research on this, I'd stick with either the Z1 headers, or go long tube headers. So the bad news is, if you're considering headers, you're probably going to get rid of your existing HFCs/TPs.

markesc · 09-15-2017, 02:47 AM

I'd just stick with the stock header and get a tune done.

Or!! Consider that Wavetrac rear diff from Z1 with a shorter final drive = there's your additional acceleration and ability to actually put it to the ground. That's where I'd put money assuming you've dialed in everything else.

09-12-2017, 10:14 AM	#1 (permalink)
nandosman Enthusiast Member Join Date: Mar 2017 Location: IL, US Posts: 344 Drives: 2014 370Z T/S Rep Power: 8	Headers for FI HFC I searched through the forum but didn't find a proper answer. I have (or rather, will soon have) FI CBE and FI HFC. I'm wondering two things: 1- Which header would fit them, and 2- Will it be worth the money I had my eyes on the Z1 400HP package (without their test pipes, oc): https://www.z1motorsports.com/z1-pro...ge-p-7223.html but from some of the posts I read here, it seems fitment will be an issue unless it's with their HFC/Test Pipes. What are your thoughts on this?

09-12-2017, 11:12 AM	#2 (permalink)
JLarson A True Z Fanatic Join Date: Jun 2017 Location: Media, PA Posts: 4,074 Drives: 14 Nissan 370z MR M6 Rep Power: 2684370	Essentially the issue you'll run into is your current HFCs have a different flange from the flange on the headers, so they won't fit with the Z1 headers, which were designed for the 350z. You'll either need to buy a header designed for the 370z, or buy a cat-section that was designed for the 350z and pair it with the momentum/z1 headers. __________________ 2014 370z Touring Sport Magma Red MT // BP Single Turbo 6467 // 63mm TB's // Z1 Ported Upper Mani // RJM Pedal // Zspeed Stage 3 Clutch // 526 WHP, 451 WTQ 2006 350z (Sold) // 1990 300zx (Sold) // 1985 300zx 2+2 (Sold)

09-12-2017, 12:53 PM	#4 (permalink)
JLarson A True Z Fanatic Join Date: Jun 2017 Location: Media, PA Posts: 4,074 Drives: 14 Nissan 370z MR M6 Rep Power: 2684370	Stillen headers have shown no gains or very low gains - lot of effort for minimal results. Personally, after a lot of research on this, I'd stick with either the Z1 headers, or go long tube headers. So the bad news is, if you're considering headers, you're probably going to get rid of your existing HFCs/TPs. __________________ 2014 370z Touring Sport Magma Red MT // BP Single Turbo 6467 // 63mm TB's // Z1 Ported Upper Mani // RJM Pedal // Zspeed Stage 3 Clutch // 526 WHP, 451 WTQ 2006 350z (Sold) // 1990 300zx (Sold) // 1985 300zx 2+2 (Sold)

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09-12-2017, 12:05 PM	#3 (permalink)
nandosman Enthusiast Member Join Date: Mar 2017 Location: IL, US Posts: 344 Drives: 2014 370Z T/S Rep Power: 8	So are there any other headers, worth pruchasing, that will fit my FI HFC? What about the stillen ones?

09-15-2017, 02:47 AM	#5 (permalink)
markesc Enthusiast Member Join Date: Apr 2014 Location: Utah Posts: 381 Drives: 2014 370z M.B. 7AT Rep Power: 3366	I'd just stick with the stock header and get a tune done. Or!! Consider that Wavetrac rear diff from Z1 with a shorter final drive = there's your additional acceleration and ability to actually put it to the ground. That's where I'd put money assuming you've dialed in everything else.