C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

I Ordered the Wrong NGK's

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Old Sep 6, 2001 | 10:31 AM
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HiTech5's Avatar
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Default I Ordered the Wrong NGK's

In my effort to get the best NGK plug for my 383, I custom ordered the wrong plugs. The plugs I ordered are for a LT1 or LT4 cylinder head. Apparently these heads use a tapered. I need a flat seat with washer for my AFR heads. These plugs are not returnable since they were a custom order.
Anyone interested? The plugs are NGK Irridium's Part # TR55IX. They are BRAND NEW in the box. The plugs were $6.00 each but I'll sell them for $40 including shipping. E-mail me if interested.
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Old Sep 6, 2001 | 10:54 AM
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Default Re: I Ordered the Wrong NGK's (HiTech5)

dude put this in c4 parts for sale you will have better luck sellin them :D
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Old Sep 6, 2001 | 09:26 PM
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Default Re: I Ordered the Wrong NGK's (HiTech5)

HiTech5, those plugs are not for any aluminum head that I'm aware of. All require the crush washer, non tapered plugs.

Do you have a part number listing for the NGK plugs? I got a recommendation for an NGK plug with a part number of R5672A-8. These are a racing plug.
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Old Sep 6, 2001 | 09:50 PM
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Default Re: I Ordered the Wrong NGK's (h rocks)

HiTech5, those plugs are not for any aluminum head that I'm aware of. All require the crush washer, non tapered plugs.
Actually the TR55/TR55IX is a drop-in plug for the LT1/4, which uses the tapered seat.

I'm sure you would have no problem selling them in the For Sale section.
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Old Sep 6, 2001 | 09:52 PM
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Default Re: I Ordered the Wrong NGK's (HiTech5)

I am running these plugs on my LT4 after the AC OEM platinums gave up the platinum pucks!! :eek: These plugs are great as my car felt a bit more eager to rev to 6400RPM :D
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