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Old 11-16-2021, 05:12 PM   #1
proITchamp
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I have clearance problems with off the shelf headers on my D21.
Anyone know if 240SX headers will fit the NapZ engine?
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Old 11-16-2021, 06:27 PM   #2
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No. 240s never had a NAPS-Z engine. Which off-the-shelf headers did you get?
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Old 11-18-2021, 02:19 PM   #3
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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.
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Old 11-21-2021, 10:34 PM   #4
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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
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Old 11-22-2021, 01:04 AM   #5
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Heads on the KA and NAPS-Z are nowhere near similar.
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Old 11-22-2021, 09:16 PM   #6
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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.
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Old 12-03-2021, 08:24 PM   #7
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I should have said the exhaust ports. I know the heads are totally different.
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