Headers - Infamous Nissan

proITchamp · 11-16-2021, 05:12 PM

I have clearance problems with off the shelf headers on my D21.
Anyone know if 240SX headers will fit the NapZ engine?

dvdswan · 11-16-2021, 06:27 PM

No. 240s never had a NAPS-Z engine. Which off-the-shelf headers did you get?

proITchamp · 11-18-2021, 02:19 PM

I have tried several different headers and all are too long on the vertical plane. My truck is lowered for road racing.
I realize that the 240SX never had a NapZ engine but it was my understanding that the heads on the NapZ and the K engine were similar.
Thanks for any insight.

Willtrob88 · 11-21-2021, 10:34 PM

proITchamp, I bought a stainless steel header for my '91 d21 fit perfect did not have to remove nothing, go to eBay type in stainless steel header for Nissan d21 Hardbody

dvdswan · 11-22-2021, 01:04 AM

Heads on the KA and NAPS-Z are nowhere near similar.

XoXSciFiGuy · 11-22-2021, 09:16 PM

If you can't get headers to work, maybe an alternate road for you would be to go to dual exhaust somehow. Leave the exhaust you have now, split it further down the line maybe? At least you could lower the back pressure I guess. Truth is I never messed with the exhaust system much on hardbodies. Not an expert at all.

proITchamp · 12-03-2021, 08:24 PM

I should have said the exhaust ports. I know the heads are totally different.
Thanks

11-16-2021, 05:12 PM	#1
proITchamp proITchamp Join Date: Nov 2021 Location: SC Posts: 5 Vehicle: 1989 Nissan D21 Thanks: 0 Thanked 0 Times in 0 Posts	Headers I have clearance problems with off the shelf headers on my D21. Anyone know if 240SX headers will fit the NapZ engine?

11-16-2021, 06:27 PM	#2
dvdswan Super Moderator Join Date: Mar 2009 Location: Port Orchard, WA Posts: 5,538 Vehicle: 96 HB Thanks: 203 Thanked 864 Times in 755 Posts	No. 240s never had a NAPS-Z engine. Which off-the-shelf headers did you get? __________________ Dave 96 HB XE SAS'd D44 3-link on 35s http://www.cardomain.com/ride/2618002

11-18-2021, 02:19 PM	#3
proITchamp proITchamp Join Date: Nov 2021 Location: SC Posts: 5 Vehicle: 1989 Nissan D21 Thanks: 0 Thanked 0 Times in 0 Posts	Headers I have tried several different headers and all are too long on the vertical plane. My truck is lowered for road racing. I realize that the 240SX never had a NapZ engine but it was my understanding that the heads on the NapZ and the K engine were similar. Thanks for any insight.

11-22-2021, 01:04 AM	#5
dvdswan Super Moderator Join Date: Mar 2009 Location: Port Orchard, WA Posts: 5,538 Vehicle: 96 HB Thanks: 203 Thanked 864 Times in 755 Posts	Heads on the KA and NAPS-Z are nowhere near similar. __________________ Dave 96 HB XE SAS'd D44 3-link on 35s http://www.cardomain.com/ride/2618002

11-22-2021, 09:16 PM	#6
XoXSciFiGuy Join Date: May 2017 Location: Yakima, WA Posts: 3,334 Vehicle: 2009 Xterra, 1997 D21 King Cab XE (sold) Thanks: 241 Thanked 674 Times in 606 Posts	If you can't get headers to work, maybe an alternate road for you would be to go to dual exhaust somehow. Leave the exhaust you have now, split it further down the line maybe? At least you could lower the back pressure I guess. Truth is I never messed with the exhaust system much on hardbodies. Not an expert at all. __________________ 2009 Xterra, 4.0 liter, automatic, 4WD. Need a technical manual? Drop me a message. Chilton's for amateurs.

11-21-2021, 10:34 PM	#4
Willtrob88 Join Date: Oct 2021 Location: VA Posts: 28 Vehicle: 1988 Nissan d21 Hardbody base 2.4l Thanks: 18 Thanked 0 Times in 0 Posts	proITchamp, I bought a stainless steel header for my '91 d21 fit perfect did not have to remove nothing, go to eBay type in stainless steel header for Nissan d21 Hardbody

12-03-2021, 08:24 PM	#7
proITchamp proITchamp Join Date: Nov 2021 Location: SC Posts: 5 Vehicle: 1989 Nissan D21 Thanks: 0 Thanked 0 Times in 0 Posts	DVDSwan I should have said the exhaust ports. I know the heads are totally different. Thanks

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